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![Arnd Bergmann](/assets/img/avatar_default.png)
The values in encode_time_delta are always small and don't overflow the range of 'struct timespec', so changing it has no effect. Change it to timespec64 as a prerequisite for removing the timespec definition later. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
4738 lines
119 KiB
C
4738 lines
119 KiB
C
/*
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* Server-side XDR for NFSv4
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*
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* Copyright (c) 2002 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Kendrick Smith <kmsmith@umich.edu>
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* Andy Adamson <andros@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/file.h>
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#include <linux/slab.h>
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#include <linux/namei.h>
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#include <linux/statfs.h>
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#include <linux/utsname.h>
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#include <linux/pagemap.h>
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#include <linux/sunrpc/svcauth_gss.h>
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#include <linux/sunrpc/addr.h>
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#include "idmap.h"
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#include "acl.h"
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#include "xdr4.h"
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#include "vfs.h"
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#include "state.h"
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#include "cache.h"
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#include "netns.h"
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#include "pnfs.h"
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#include "filecache.h"
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#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
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#include <linux/security.h>
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#endif
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#define NFSDDBG_FACILITY NFSDDBG_XDR
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const u32 nfsd_suppattrs[3][3] = {
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{NFSD4_SUPPORTED_ATTRS_WORD0,
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NFSD4_SUPPORTED_ATTRS_WORD1,
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NFSD4_SUPPORTED_ATTRS_WORD2},
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{NFSD4_1_SUPPORTED_ATTRS_WORD0,
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NFSD4_1_SUPPORTED_ATTRS_WORD1,
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NFSD4_1_SUPPORTED_ATTRS_WORD2},
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{NFSD4_1_SUPPORTED_ATTRS_WORD0,
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NFSD4_1_SUPPORTED_ATTRS_WORD1,
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NFSD4_2_SUPPORTED_ATTRS_WORD2},
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};
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/*
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* As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
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* directory in order to indicate to the client that a filesystem boundary is present
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* We use a fixed fsid for a referral
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*/
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#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
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#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
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static __be32
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check_filename(char *str, int len)
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{
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int i;
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if (len == 0)
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return nfserr_inval;
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if (isdotent(str, len))
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return nfserr_badname;
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for (i = 0; i < len; i++)
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if (str[i] == '/')
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return nfserr_badname;
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return 0;
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}
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#define DECODE_HEAD \
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__be32 *p; \
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__be32 status
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#define DECODE_TAIL \
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status = 0; \
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out: \
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return status; \
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xdr_error: \
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dprintk("NFSD: xdr error (%s:%d)\n", \
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__FILE__, __LINE__); \
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status = nfserr_bad_xdr; \
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goto out
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#define READMEM(x,nbytes) do { \
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x = (char *)p; \
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p += XDR_QUADLEN(nbytes); \
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} while (0)
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#define SAVEMEM(x,nbytes) do { \
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if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
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savemem(argp, p, nbytes) : \
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(char *)p)) { \
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dprintk("NFSD: xdr error (%s:%d)\n", \
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__FILE__, __LINE__); \
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goto xdr_error; \
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} \
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p += XDR_QUADLEN(nbytes); \
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} while (0)
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#define COPYMEM(x,nbytes) do { \
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memcpy((x), p, nbytes); \
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p += XDR_QUADLEN(nbytes); \
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} while (0)
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/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
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#define READ_BUF(nbytes) do { \
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if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
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p = argp->p; \
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argp->p += XDR_QUADLEN(nbytes); \
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} else if (!(p = read_buf(argp, nbytes))) { \
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dprintk("NFSD: xdr error (%s:%d)\n", \
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__FILE__, __LINE__); \
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goto xdr_error; \
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} \
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} while (0)
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static void next_decode_page(struct nfsd4_compoundargs *argp)
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{
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argp->p = page_address(argp->pagelist[0]);
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argp->pagelist++;
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if (argp->pagelen < PAGE_SIZE) {
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argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
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argp->pagelen = 0;
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} else {
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argp->end = argp->p + (PAGE_SIZE>>2);
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argp->pagelen -= PAGE_SIZE;
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}
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}
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static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
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{
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/* We want more bytes than seem to be available.
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* Maybe we need a new page, maybe we have just run out
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*/
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unsigned int avail = (char *)argp->end - (char *)argp->p;
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__be32 *p;
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if (argp->pagelen == 0) {
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struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
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if (!argp->tail) {
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argp->tail = true;
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avail = vec->iov_len;
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argp->p = vec->iov_base;
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argp->end = vec->iov_base + avail;
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}
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if (avail < nbytes)
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return NULL;
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p = argp->p;
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argp->p += XDR_QUADLEN(nbytes);
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return p;
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}
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if (avail + argp->pagelen < nbytes)
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return NULL;
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if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
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return NULL;
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/* ok, we can do it with the current plus the next page */
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if (nbytes <= sizeof(argp->tmp))
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p = argp->tmp;
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else {
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kfree(argp->tmpp);
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p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
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if (!p)
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return NULL;
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}
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/*
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* The following memcpy is safe because read_buf is always
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* called with nbytes > avail, and the two cases above both
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* guarantee p points to at least nbytes bytes.
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*/
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memcpy(p, argp->p, avail);
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next_decode_page(argp);
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memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
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argp->p += XDR_QUADLEN(nbytes - avail);
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return p;
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}
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static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp)
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{
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unsigned int this = (char *)argp->end - (char *)argp->p;
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return this + argp->pagelen;
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}
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static int zero_clientid(clientid_t *clid)
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{
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return (clid->cl_boot == 0) && (clid->cl_id == 0);
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}
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/**
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* svcxdr_tmpalloc - allocate memory to be freed after compound processing
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* @argp: NFSv4 compound argument structure
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* @len: length of buffer to allocate
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*
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* Allocates a buffer of size @len to be freed when processing the compound
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* operation described in @argp finishes.
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*/
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static void *
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svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
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{
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struct svcxdr_tmpbuf *tb;
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tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
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if (!tb)
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return NULL;
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tb->next = argp->to_free;
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argp->to_free = tb;
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return tb->buf;
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}
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/*
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* For xdr strings that need to be passed to other kernel api's
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* as null-terminated strings.
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*
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* Note null-terminating in place usually isn't safe since the
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* buffer might end on a page boundary.
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*/
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static char *
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svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
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{
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char *p = svcxdr_tmpalloc(argp, len + 1);
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if (!p)
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return NULL;
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memcpy(p, buf, len);
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p[len] = '\0';
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return p;
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}
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/**
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* savemem - duplicate a chunk of memory for later processing
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* @argp: NFSv4 compound argument structure to be freed with
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* @p: pointer to be duplicated
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* @nbytes: length to be duplicated
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*
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* Returns a pointer to a copy of @nbytes bytes of memory at @p
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* that are preserved until processing of the NFSv4 compound
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* operation described by @argp finishes.
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*/
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static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
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{
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void *ret;
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ret = svcxdr_tmpalloc(argp, nbytes);
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if (!ret)
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return NULL;
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memcpy(ret, p, nbytes);
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return ret;
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}
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static __be32
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nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
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{
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DECODE_HEAD;
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READ_BUF(12);
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p = xdr_decode_hyper(p, &tv->tv_sec);
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tv->tv_nsec = be32_to_cpup(p++);
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if (tv->tv_nsec >= (u32)1000000000)
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return nfserr_inval;
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DECODE_TAIL;
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}
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static __be32
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nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
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{
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u32 bmlen;
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DECODE_HEAD;
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bmval[0] = 0;
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bmval[1] = 0;
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bmval[2] = 0;
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READ_BUF(4);
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bmlen = be32_to_cpup(p++);
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if (bmlen > 1000)
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goto xdr_error;
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READ_BUF(bmlen << 2);
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if (bmlen > 0)
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bmval[0] = be32_to_cpup(p++);
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if (bmlen > 1)
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bmval[1] = be32_to_cpup(p++);
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if (bmlen > 2)
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bmval[2] = be32_to_cpup(p++);
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DECODE_TAIL;
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}
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static __be32
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nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
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struct iattr *iattr, struct nfs4_acl **acl,
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struct xdr_netobj *label, int *umask)
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{
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int expected_len, len = 0;
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u32 dummy32;
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char *buf;
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DECODE_HEAD;
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iattr->ia_valid = 0;
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if ((status = nfsd4_decode_bitmap(argp, bmval)))
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return status;
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if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
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|| bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
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|| bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
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if (nfsd_attrs_supported(argp->minorversion, bmval))
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return nfserr_inval;
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return nfserr_attrnotsupp;
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}
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|
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READ_BUF(4);
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expected_len = be32_to_cpup(p++);
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|
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if (bmval[0] & FATTR4_WORD0_SIZE) {
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READ_BUF(8);
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len += 8;
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p = xdr_decode_hyper(p, &iattr->ia_size);
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iattr->ia_valid |= ATTR_SIZE;
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}
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if (bmval[0] & FATTR4_WORD0_ACL) {
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u32 nace;
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struct nfs4_ace *ace;
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READ_BUF(4); len += 4;
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nace = be32_to_cpup(p++);
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if (nace > compoundargs_bytes_left(argp)/20)
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/*
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* Even with 4-byte names there wouldn't be
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* space for that many aces; something fishy is
|
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* going on:
|
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*/
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return nfserr_fbig;
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|
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*acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
|
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if (*acl == NULL)
|
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return nfserr_jukebox;
|
|
|
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(*acl)->naces = nace;
|
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for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
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READ_BUF(16); len += 16;
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ace->type = be32_to_cpup(p++);
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ace->flag = be32_to_cpup(p++);
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ace->access_mask = be32_to_cpup(p++);
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dummy32 = be32_to_cpup(p++);
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READ_BUF(dummy32);
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len += XDR_QUADLEN(dummy32) << 2;
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READMEM(buf, dummy32);
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ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
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status = nfs_ok;
|
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if (ace->whotype != NFS4_ACL_WHO_NAMED)
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;
|
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else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
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status = nfsd_map_name_to_gid(argp->rqstp,
|
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buf, dummy32, &ace->who_gid);
|
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else
|
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status = nfsd_map_name_to_uid(argp->rqstp,
|
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buf, dummy32, &ace->who_uid);
|
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if (status)
|
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return status;
|
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}
|
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} else
|
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*acl = NULL;
|
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if (bmval[1] & FATTR4_WORD1_MODE) {
|
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READ_BUF(4);
|
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len += 4;
|
|
iattr->ia_mode = be32_to_cpup(p++);
|
|
iattr->ia_mode &= (S_IFMT | S_IALLUGO);
|
|
iattr->ia_valid |= ATTR_MODE;
|
|
}
|
|
if (bmval[1] & FATTR4_WORD1_OWNER) {
|
|
READ_BUF(4);
|
|
len += 4;
|
|
dummy32 = be32_to_cpup(p++);
|
|
READ_BUF(dummy32);
|
|
len += (XDR_QUADLEN(dummy32) << 2);
|
|
READMEM(buf, dummy32);
|
|
if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
|
|
return status;
|
|
iattr->ia_valid |= ATTR_UID;
|
|
}
|
|
if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
|
|
READ_BUF(4);
|
|
len += 4;
|
|
dummy32 = be32_to_cpup(p++);
|
|
READ_BUF(dummy32);
|
|
len += (XDR_QUADLEN(dummy32) << 2);
|
|
READMEM(buf, dummy32);
|
|
if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
|
|
return status;
|
|
iattr->ia_valid |= ATTR_GID;
|
|
}
|
|
if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
|
|
READ_BUF(4);
|
|
len += 4;
|
|
dummy32 = be32_to_cpup(p++);
|
|
switch (dummy32) {
|
|
case NFS4_SET_TO_CLIENT_TIME:
|
|
len += 12;
|
|
status = nfsd4_decode_time(argp, &iattr->ia_atime);
|
|
if (status)
|
|
return status;
|
|
iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
|
|
break;
|
|
case NFS4_SET_TO_SERVER_TIME:
|
|
iattr->ia_valid |= ATTR_ATIME;
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
}
|
|
if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
|
|
READ_BUF(4);
|
|
len += 4;
|
|
dummy32 = be32_to_cpup(p++);
|
|
switch (dummy32) {
|
|
case NFS4_SET_TO_CLIENT_TIME:
|
|
len += 12;
|
|
status = nfsd4_decode_time(argp, &iattr->ia_mtime);
|
|
if (status)
|
|
return status;
|
|
iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
|
|
break;
|
|
case NFS4_SET_TO_SERVER_TIME:
|
|
iattr->ia_valid |= ATTR_MTIME;
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
}
|
|
|
|
label->len = 0;
|
|
if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
|
|
bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
|
|
READ_BUF(4);
|
|
len += 4;
|
|
dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
|
|
READ_BUF(4);
|
|
len += 4;
|
|
dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
|
|
READ_BUF(4);
|
|
len += 4;
|
|
dummy32 = be32_to_cpup(p++);
|
|
READ_BUF(dummy32);
|
|
if (dummy32 > NFS4_MAXLABELLEN)
|
|
return nfserr_badlabel;
|
|
len += (XDR_QUADLEN(dummy32) << 2);
|
|
READMEM(buf, dummy32);
|
|
label->len = dummy32;
|
|
label->data = svcxdr_dupstr(argp, buf, dummy32);
|
|
if (!label->data)
|
|
return nfserr_jukebox;
|
|
}
|
|
if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
|
|
if (!umask)
|
|
goto xdr_error;
|
|
READ_BUF(8);
|
|
len += 8;
|
|
dummy32 = be32_to_cpup(p++);
|
|
iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
|
|
dummy32 = be32_to_cpup(p++);
|
|
*umask = dummy32 & S_IRWXUGO;
|
|
iattr->ia_valid |= ATTR_MODE;
|
|
}
|
|
if (len != expected_len)
|
|
goto xdr_error;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(sizeof(stateid_t));
|
|
sid->si_generation = be32_to_cpup(p++);
|
|
COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
access->ac_req_access = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
|
|
{
|
|
DECODE_HEAD;
|
|
struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
|
|
u32 dummy, uid, gid;
|
|
char *machine_name;
|
|
int i;
|
|
int nr_secflavs;
|
|
|
|
/* callback_sec_params4 */
|
|
READ_BUF(4);
|
|
nr_secflavs = be32_to_cpup(p++);
|
|
if (nr_secflavs)
|
|
cbs->flavor = (u32)(-1);
|
|
else
|
|
/* Is this legal? Be generous, take it to mean AUTH_NONE: */
|
|
cbs->flavor = 0;
|
|
for (i = 0; i < nr_secflavs; ++i) {
|
|
READ_BUF(4);
|
|
dummy = be32_to_cpup(p++);
|
|
switch (dummy) {
|
|
case RPC_AUTH_NULL:
|
|
/* Nothing to read */
|
|
if (cbs->flavor == (u32)(-1))
|
|
cbs->flavor = RPC_AUTH_NULL;
|
|
break;
|
|
case RPC_AUTH_UNIX:
|
|
READ_BUF(8);
|
|
/* stamp */
|
|
dummy = be32_to_cpup(p++);
|
|
|
|
/* machine name */
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy);
|
|
SAVEMEM(machine_name, dummy);
|
|
|
|
/* uid, gid */
|
|
READ_BUF(8);
|
|
uid = be32_to_cpup(p++);
|
|
gid = be32_to_cpup(p++);
|
|
|
|
/* more gids */
|
|
READ_BUF(4);
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy * 4);
|
|
if (cbs->flavor == (u32)(-1)) {
|
|
kuid_t kuid = make_kuid(userns, uid);
|
|
kgid_t kgid = make_kgid(userns, gid);
|
|
if (uid_valid(kuid) && gid_valid(kgid)) {
|
|
cbs->uid = kuid;
|
|
cbs->gid = kgid;
|
|
cbs->flavor = RPC_AUTH_UNIX;
|
|
} else {
|
|
dprintk("RPC_AUTH_UNIX with invalid"
|
|
"uid or gid ignoring!\n");
|
|
}
|
|
}
|
|
break;
|
|
case RPC_AUTH_GSS:
|
|
dprintk("RPC_AUTH_GSS callback secflavor "
|
|
"not supported!\n");
|
|
READ_BUF(8);
|
|
/* gcbp_service */
|
|
dummy = be32_to_cpup(p++);
|
|
/* gcbp_handle_from_server */
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
/* gcbp_handle_from_client */
|
|
READ_BUF(4);
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy);
|
|
break;
|
|
default:
|
|
dprintk("Illegal callback secflavor\n");
|
|
return nfserr_inval;
|
|
}
|
|
}
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
bc->bc_cb_program = be32_to_cpup(p++);
|
|
nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
|
|
COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
bcts->dir = be32_to_cpup(p++);
|
|
/* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
|
|
* could help us figure out we should be using it. */
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
close->cl_seqid = be32_to_cpup(p++);
|
|
return nfsd4_decode_stateid(argp, &close->cl_stateid);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(12);
|
|
p = xdr_decode_hyper(p, &commit->co_offset);
|
|
commit->co_count = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
create->cr_type = be32_to_cpup(p++);
|
|
switch (create->cr_type) {
|
|
case NF4LNK:
|
|
READ_BUF(4);
|
|
create->cr_datalen = be32_to_cpup(p++);
|
|
READ_BUF(create->cr_datalen);
|
|
create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
|
|
if (!create->cr_data)
|
|
return nfserr_jukebox;
|
|
break;
|
|
case NF4BLK:
|
|
case NF4CHR:
|
|
READ_BUF(8);
|
|
create->cr_specdata1 = be32_to_cpup(p++);
|
|
create->cr_specdata2 = be32_to_cpup(p++);
|
|
break;
|
|
case NF4SOCK:
|
|
case NF4FIFO:
|
|
case NF4DIR:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
READ_BUF(4);
|
|
create->cr_namelen = be32_to_cpup(p++);
|
|
READ_BUF(create->cr_namelen);
|
|
SAVEMEM(create->cr_name, create->cr_namelen);
|
|
if ((status = check_filename(create->cr_name, create->cr_namelen)))
|
|
return status;
|
|
|
|
status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
|
|
&create->cr_acl, &create->cr_label,
|
|
&create->cr_umask);
|
|
if (status)
|
|
goto out;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static inline __be32
|
|
nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
|
|
{
|
|
return nfsd4_decode_stateid(argp, &dr->dr_stateid);
|
|
}
|
|
|
|
static inline __be32
|
|
nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
|
|
{
|
|
return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
link->li_namelen = be32_to_cpup(p++);
|
|
READ_BUF(link->li_namelen);
|
|
SAVEMEM(link->li_name, link->li_namelen);
|
|
if ((status = check_filename(link->li_name, link->li_namelen)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
/*
|
|
* type, reclaim(boolean), offset, length, new_lock_owner(boolean)
|
|
*/
|
|
READ_BUF(28);
|
|
lock->lk_type = be32_to_cpup(p++);
|
|
if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
|
|
goto xdr_error;
|
|
lock->lk_reclaim = be32_to_cpup(p++);
|
|
p = xdr_decode_hyper(p, &lock->lk_offset);
|
|
p = xdr_decode_hyper(p, &lock->lk_length);
|
|
lock->lk_is_new = be32_to_cpup(p++);
|
|
|
|
if (lock->lk_is_new) {
|
|
READ_BUF(4);
|
|
lock->lk_new_open_seqid = be32_to_cpup(p++);
|
|
status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(8 + sizeof(clientid_t));
|
|
lock->lk_new_lock_seqid = be32_to_cpup(p++);
|
|
COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
|
|
lock->lk_new_owner.len = be32_to_cpup(p++);
|
|
READ_BUF(lock->lk_new_owner.len);
|
|
READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
|
|
} else {
|
|
status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
lock->lk_old_lock_seqid = be32_to_cpup(p++);
|
|
}
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(32);
|
|
lockt->lt_type = be32_to_cpup(p++);
|
|
if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
|
|
goto xdr_error;
|
|
p = xdr_decode_hyper(p, &lockt->lt_offset);
|
|
p = xdr_decode_hyper(p, &lockt->lt_length);
|
|
COPYMEM(&lockt->lt_clientid, 8);
|
|
lockt->lt_owner.len = be32_to_cpup(p++);
|
|
READ_BUF(lockt->lt_owner.len);
|
|
READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(8);
|
|
locku->lu_type = be32_to_cpup(p++);
|
|
if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
|
|
goto xdr_error;
|
|
locku->lu_seqid = be32_to_cpup(p++);
|
|
status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(16);
|
|
p = xdr_decode_hyper(p, &locku->lu_offset);
|
|
p = xdr_decode_hyper(p, &locku->lu_length);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
lookup->lo_len = be32_to_cpup(p++);
|
|
READ_BUF(lookup->lo_len);
|
|
SAVEMEM(lookup->lo_name, lookup->lo_len);
|
|
if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
|
|
{
|
|
__be32 *p;
|
|
u32 w;
|
|
|
|
READ_BUF(4);
|
|
w = be32_to_cpup(p++);
|
|
*share_access = w & NFS4_SHARE_ACCESS_MASK;
|
|
*deleg_want = w & NFS4_SHARE_WANT_MASK;
|
|
if (deleg_when)
|
|
*deleg_when = w & NFS4_SHARE_WHEN_MASK;
|
|
|
|
switch (w & NFS4_SHARE_ACCESS_MASK) {
|
|
case NFS4_SHARE_ACCESS_READ:
|
|
case NFS4_SHARE_ACCESS_WRITE:
|
|
case NFS4_SHARE_ACCESS_BOTH:
|
|
break;
|
|
default:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
w &= ~NFS4_SHARE_ACCESS_MASK;
|
|
if (!w)
|
|
return nfs_ok;
|
|
if (!argp->minorversion)
|
|
return nfserr_bad_xdr;
|
|
switch (w & NFS4_SHARE_WANT_MASK) {
|
|
case NFS4_SHARE_WANT_NO_PREFERENCE:
|
|
case NFS4_SHARE_WANT_READ_DELEG:
|
|
case NFS4_SHARE_WANT_WRITE_DELEG:
|
|
case NFS4_SHARE_WANT_ANY_DELEG:
|
|
case NFS4_SHARE_WANT_NO_DELEG:
|
|
case NFS4_SHARE_WANT_CANCEL:
|
|
break;
|
|
default:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
w &= ~NFS4_SHARE_WANT_MASK;
|
|
if (!w)
|
|
return nfs_ok;
|
|
|
|
if (!deleg_when) /* open_downgrade */
|
|
return nfserr_inval;
|
|
switch (w) {
|
|
case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
|
|
case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
|
|
case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
|
|
NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
|
|
return nfs_ok;
|
|
}
|
|
xdr_error:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
|
|
{
|
|
__be32 *p;
|
|
|
|
READ_BUF(4);
|
|
*x = be32_to_cpup(p++);
|
|
/* Note: unlinke access bits, deny bits may be zero. */
|
|
if (*x & ~NFS4_SHARE_DENY_BOTH)
|
|
return nfserr_bad_xdr;
|
|
return nfs_ok;
|
|
xdr_error:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
|
|
{
|
|
__be32 *p;
|
|
|
|
READ_BUF(4);
|
|
o->len = be32_to_cpup(p++);
|
|
|
|
if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
|
|
return nfserr_bad_xdr;
|
|
|
|
READ_BUF(o->len);
|
|
SAVEMEM(o->data, o->len);
|
|
return nfs_ok;
|
|
xdr_error:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
|
|
{
|
|
DECODE_HEAD;
|
|
u32 dummy;
|
|
|
|
memset(open->op_bmval, 0, sizeof(open->op_bmval));
|
|
open->op_iattr.ia_valid = 0;
|
|
open->op_openowner = NULL;
|
|
|
|
open->op_xdr_error = 0;
|
|
/* seqid, share_access, share_deny, clientid, ownerlen */
|
|
READ_BUF(4);
|
|
open->op_seqid = be32_to_cpup(p++);
|
|
/* decode, yet ignore deleg_when until supported */
|
|
status = nfsd4_decode_share_access(argp, &open->op_share_access,
|
|
&open->op_deleg_want, &dummy);
|
|
if (status)
|
|
goto xdr_error;
|
|
status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
|
|
if (status)
|
|
goto xdr_error;
|
|
READ_BUF(sizeof(clientid_t));
|
|
COPYMEM(&open->op_clientid, sizeof(clientid_t));
|
|
status = nfsd4_decode_opaque(argp, &open->op_owner);
|
|
if (status)
|
|
goto xdr_error;
|
|
READ_BUF(4);
|
|
open->op_create = be32_to_cpup(p++);
|
|
switch (open->op_create) {
|
|
case NFS4_OPEN_NOCREATE:
|
|
break;
|
|
case NFS4_OPEN_CREATE:
|
|
READ_BUF(4);
|
|
open->op_createmode = be32_to_cpup(p++);
|
|
switch (open->op_createmode) {
|
|
case NFS4_CREATE_UNCHECKED:
|
|
case NFS4_CREATE_GUARDED:
|
|
status = nfsd4_decode_fattr(argp, open->op_bmval,
|
|
&open->op_iattr, &open->op_acl, &open->op_label,
|
|
&open->op_umask);
|
|
if (status)
|
|
goto out;
|
|
break;
|
|
case NFS4_CREATE_EXCLUSIVE:
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
|
|
break;
|
|
case NFS4_CREATE_EXCLUSIVE4_1:
|
|
if (argp->minorversion < 1)
|
|
goto xdr_error;
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
|
|
status = nfsd4_decode_fattr(argp, open->op_bmval,
|
|
&open->op_iattr, &open->op_acl, &open->op_label,
|
|
&open->op_umask);
|
|
if (status)
|
|
goto out;
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
|
|
/* open_claim */
|
|
READ_BUF(4);
|
|
open->op_claim_type = be32_to_cpup(p++);
|
|
switch (open->op_claim_type) {
|
|
case NFS4_OPEN_CLAIM_NULL:
|
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
|
|
READ_BUF(4);
|
|
open->op_fname.len = be32_to_cpup(p++);
|
|
READ_BUF(open->op_fname.len);
|
|
SAVEMEM(open->op_fname.data, open->op_fname.len);
|
|
if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
|
|
return status;
|
|
break;
|
|
case NFS4_OPEN_CLAIM_PREVIOUS:
|
|
READ_BUF(4);
|
|
open->op_delegate_type = be32_to_cpup(p++);
|
|
break;
|
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
|
|
status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
open->op_fname.len = be32_to_cpup(p++);
|
|
READ_BUF(open->op_fname.len);
|
|
SAVEMEM(open->op_fname.data, open->op_fname.len);
|
|
if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
|
|
return status;
|
|
break;
|
|
case NFS4_OPEN_CLAIM_FH:
|
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
|
|
if (argp->minorversion < 1)
|
|
goto xdr_error;
|
|
/* void */
|
|
break;
|
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
|
|
if (argp->minorversion < 1)
|
|
goto xdr_error;
|
|
status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
|
|
if (status)
|
|
return status;
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
open_conf->oc_seqid = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
open_down->od_seqid = be32_to_cpup(p++);
|
|
status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
|
|
&open_down->od_deleg_want, NULL);
|
|
if (status)
|
|
return status;
|
|
status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
|
|
if (status)
|
|
return status;
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
putfh->pf_fhlen = be32_to_cpup(p++);
|
|
if (putfh->pf_fhlen > NFS4_FHSIZE)
|
|
goto xdr_error;
|
|
READ_BUF(putfh->pf_fhlen);
|
|
SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
|
|
{
|
|
if (argp->minorversion == 0)
|
|
return nfs_ok;
|
|
return nfserr_notsupp;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &read->rd_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(12);
|
|
p = xdr_decode_hyper(p, &read->rd_offset);
|
|
read->rd_length = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(24);
|
|
p = xdr_decode_hyper(p, &readdir->rd_cookie);
|
|
COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
|
|
readdir->rd_dircount = be32_to_cpup(p++);
|
|
readdir->rd_maxcount = be32_to_cpup(p++);
|
|
if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
|
|
goto out;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
remove->rm_namelen = be32_to_cpup(p++);
|
|
READ_BUF(remove->rm_namelen);
|
|
SAVEMEM(remove->rm_name, remove->rm_namelen);
|
|
if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
rename->rn_snamelen = be32_to_cpup(p++);
|
|
READ_BUF(rename->rn_snamelen);
|
|
SAVEMEM(rename->rn_sname, rename->rn_snamelen);
|
|
READ_BUF(4);
|
|
rename->rn_tnamelen = be32_to_cpup(p++);
|
|
READ_BUF(rename->rn_tnamelen);
|
|
SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
|
|
if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
|
|
return status;
|
|
if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(sizeof(clientid_t));
|
|
COPYMEM(clientid, sizeof(clientid_t));
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_secinfo *secinfo)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
secinfo->si_namelen = be32_to_cpup(p++);
|
|
READ_BUF(secinfo->si_namelen);
|
|
SAVEMEM(secinfo->si_name, secinfo->si_namelen);
|
|
status = check_filename(secinfo->si_name, secinfo->si_namelen);
|
|
if (status)
|
|
return status;
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_secinfo_no_name *sin)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
sin->sin_style = be32_to_cpup(p++);
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
|
|
{
|
|
__be32 status;
|
|
|
|
status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
|
|
if (status)
|
|
return status;
|
|
return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
|
|
&setattr->sa_acl, &setattr->sa_label, NULL);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
|
|
|
|
status = nfsd4_decode_opaque(argp, &setclientid->se_name);
|
|
if (status)
|
|
return nfserr_bad_xdr;
|
|
READ_BUF(8);
|
|
setclientid->se_callback_prog = be32_to_cpup(p++);
|
|
setclientid->se_callback_netid_len = be32_to_cpup(p++);
|
|
READ_BUF(setclientid->se_callback_netid_len);
|
|
SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
|
|
READ_BUF(4);
|
|
setclientid->se_callback_addr_len = be32_to_cpup(p++);
|
|
|
|
READ_BUF(setclientid->se_callback_addr_len);
|
|
SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
|
|
READ_BUF(4);
|
|
setclientid->se_callback_ident = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(8 + NFS4_VERIFIER_SIZE);
|
|
COPYMEM(&scd_c->sc_clientid, 8);
|
|
COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
/* Also used for NVERIFY */
|
|
static __be32
|
|
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
|
|
goto out;
|
|
|
|
/* For convenience's sake, we compare raw xdr'd attributes in
|
|
* nfsd4_proc_verify */
|
|
|
|
READ_BUF(4);
|
|
verify->ve_attrlen = be32_to_cpup(p++);
|
|
READ_BUF(verify->ve_attrlen);
|
|
SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
|
|
{
|
|
int avail;
|
|
int len;
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &write->wr_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(16);
|
|
p = xdr_decode_hyper(p, &write->wr_offset);
|
|
write->wr_stable_how = be32_to_cpup(p++);
|
|
if (write->wr_stable_how > NFS_FILE_SYNC)
|
|
goto xdr_error;
|
|
write->wr_buflen = be32_to_cpup(p++);
|
|
|
|
/* Sorry .. no magic macros for this.. *
|
|
* READ_BUF(write->wr_buflen);
|
|
* SAVEMEM(write->wr_buf, write->wr_buflen);
|
|
*/
|
|
avail = (char*)argp->end - (char*)argp->p;
|
|
if (avail + argp->pagelen < write->wr_buflen) {
|
|
dprintk("NFSD: xdr error (%s:%d)\n",
|
|
__FILE__, __LINE__);
|
|
goto xdr_error;
|
|
}
|
|
write->wr_head.iov_base = p;
|
|
write->wr_head.iov_len = avail;
|
|
write->wr_pagelist = argp->pagelist;
|
|
|
|
len = XDR_QUADLEN(write->wr_buflen) << 2;
|
|
if (len >= avail) {
|
|
int pages;
|
|
|
|
len -= avail;
|
|
|
|
pages = len >> PAGE_SHIFT;
|
|
argp->pagelist += pages;
|
|
argp->pagelen -= pages * PAGE_SIZE;
|
|
len -= pages * PAGE_SIZE;
|
|
|
|
next_decode_page(argp);
|
|
}
|
|
argp->p += XDR_QUADLEN(len);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(12);
|
|
COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
|
|
rlockowner->rl_owner.len = be32_to_cpup(p++);
|
|
READ_BUF(rlockowner->rl_owner.len);
|
|
READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
|
|
|
|
if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
|
|
return nfserr_inval;
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_exchange_id *exid)
|
|
{
|
|
int dummy, tmp;
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
|
|
|
|
status = nfsd4_decode_opaque(argp, &exid->clname);
|
|
if (status)
|
|
return nfserr_bad_xdr;
|
|
|
|
READ_BUF(4);
|
|
exid->flags = be32_to_cpup(p++);
|
|
|
|
/* Ignore state_protect4_a */
|
|
READ_BUF(4);
|
|
exid->spa_how = be32_to_cpup(p++);
|
|
switch (exid->spa_how) {
|
|
case SP4_NONE:
|
|
break;
|
|
case SP4_MACH_CRED:
|
|
/* spo_must_enforce */
|
|
status = nfsd4_decode_bitmap(argp,
|
|
exid->spo_must_enforce);
|
|
if (status)
|
|
goto out;
|
|
/* spo_must_allow */
|
|
status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
|
|
if (status)
|
|
goto out;
|
|
break;
|
|
case SP4_SSV:
|
|
/* ssp_ops */
|
|
READ_BUF(4);
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy * 4);
|
|
p += dummy;
|
|
|
|
READ_BUF(4);
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy * 4);
|
|
p += dummy;
|
|
|
|
/* ssp_hash_algs<> */
|
|
READ_BUF(4);
|
|
tmp = be32_to_cpup(p++);
|
|
while (tmp--) {
|
|
READ_BUF(4);
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
}
|
|
|
|
/* ssp_encr_algs<> */
|
|
READ_BUF(4);
|
|
tmp = be32_to_cpup(p++);
|
|
while (tmp--) {
|
|
READ_BUF(4);
|
|
dummy = be32_to_cpup(p++);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
}
|
|
|
|
/* ignore ssp_window and ssp_num_gss_handles: */
|
|
READ_BUF(8);
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
|
|
READ_BUF(4); /* nfs_impl_id4 array length */
|
|
dummy = be32_to_cpup(p++);
|
|
|
|
if (dummy > 1)
|
|
goto xdr_error;
|
|
|
|
if (dummy == 1) {
|
|
status = nfsd4_decode_opaque(argp, &exid->nii_domain);
|
|
if (status)
|
|
goto xdr_error;
|
|
|
|
/* nii_name */
|
|
status = nfsd4_decode_opaque(argp, &exid->nii_name);
|
|
if (status)
|
|
goto xdr_error;
|
|
|
|
/* nii_date */
|
|
status = nfsd4_decode_time(argp, &exid->nii_time);
|
|
if (status)
|
|
goto xdr_error;
|
|
}
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_create_session *sess)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(16);
|
|
COPYMEM(&sess->clientid, 8);
|
|
sess->seqid = be32_to_cpup(p++);
|
|
sess->flags = be32_to_cpup(p++);
|
|
|
|
/* Fore channel attrs */
|
|
READ_BUF(28);
|
|
p++; /* headerpadsz is always 0 */
|
|
sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
|
|
sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
|
|
sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
|
|
sess->fore_channel.maxops = be32_to_cpup(p++);
|
|
sess->fore_channel.maxreqs = be32_to_cpup(p++);
|
|
sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
|
|
if (sess->fore_channel.nr_rdma_attrs == 1) {
|
|
READ_BUF(4);
|
|
sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
|
|
} else if (sess->fore_channel.nr_rdma_attrs > 1) {
|
|
dprintk("Too many fore channel attr bitmaps!\n");
|
|
goto xdr_error;
|
|
}
|
|
|
|
/* Back channel attrs */
|
|
READ_BUF(28);
|
|
p++; /* headerpadsz is always 0 */
|
|
sess->back_channel.maxreq_sz = be32_to_cpup(p++);
|
|
sess->back_channel.maxresp_sz = be32_to_cpup(p++);
|
|
sess->back_channel.maxresp_cached = be32_to_cpup(p++);
|
|
sess->back_channel.maxops = be32_to_cpup(p++);
|
|
sess->back_channel.maxreqs = be32_to_cpup(p++);
|
|
sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
|
|
if (sess->back_channel.nr_rdma_attrs == 1) {
|
|
READ_BUF(4);
|
|
sess->back_channel.rdma_attrs = be32_to_cpup(p++);
|
|
} else if (sess->back_channel.nr_rdma_attrs > 1) {
|
|
dprintk("Too many back channel attr bitmaps!\n");
|
|
goto xdr_error;
|
|
}
|
|
|
|
READ_BUF(4);
|
|
sess->callback_prog = be32_to_cpup(p++);
|
|
nfsd4_decode_cb_sec(argp, &sess->cb_sec);
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_destroy_session *destroy_session)
|
|
{
|
|
DECODE_HEAD;
|
|
READ_BUF(NFS4_MAX_SESSIONID_LEN);
|
|
COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_free_stateid *free_stateid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(sizeof(stateid_t));
|
|
free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
|
|
COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_sequence *seq)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
|
|
COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
seq->seqid = be32_to_cpup(p++);
|
|
seq->slotid = be32_to_cpup(p++);
|
|
seq->maxslots = be32_to_cpup(p++);
|
|
seq->cachethis = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
|
|
{
|
|
int i;
|
|
__be32 *p, status;
|
|
struct nfsd4_test_stateid_id *stateid;
|
|
|
|
READ_BUF(4);
|
|
test_stateid->ts_num_ids = ntohl(*p++);
|
|
|
|
INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
|
|
|
|
for (i = 0; i < test_stateid->ts_num_ids; i++) {
|
|
stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
|
|
if (!stateid) {
|
|
status = nfserrno(-ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&stateid->ts_id_list);
|
|
list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
|
|
|
|
status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
status = 0;
|
|
out:
|
|
return status;
|
|
xdr_error:
|
|
dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
|
|
status = nfserr_bad_xdr;
|
|
goto out;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(8);
|
|
COPYMEM(&dc->clientid, 8);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
rc->rca_one_fs = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
#ifdef CONFIG_NFSD_PNFS
|
|
static __be32
|
|
nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_getdeviceinfo *gdev)
|
|
{
|
|
DECODE_HEAD;
|
|
u32 num, i;
|
|
|
|
READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
|
|
COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
|
|
gdev->gd_layout_type = be32_to_cpup(p++);
|
|
gdev->gd_maxcount = be32_to_cpup(p++);
|
|
num = be32_to_cpup(p++);
|
|
if (num) {
|
|
if (num > 1000)
|
|
goto xdr_error;
|
|
READ_BUF(4 * num);
|
|
gdev->gd_notify_types = be32_to_cpup(p++);
|
|
for (i = 1; i < num; i++) {
|
|
if (be32_to_cpup(p++)) {
|
|
status = nfserr_inval;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_layoutget *lgp)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(36);
|
|
lgp->lg_signal = be32_to_cpup(p++);
|
|
lgp->lg_layout_type = be32_to_cpup(p++);
|
|
lgp->lg_seg.iomode = be32_to_cpup(p++);
|
|
p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
|
|
p = xdr_decode_hyper(p, &lgp->lg_seg.length);
|
|
p = xdr_decode_hyper(p, &lgp->lg_minlength);
|
|
|
|
status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
|
|
if (status)
|
|
return status;
|
|
|
|
READ_BUF(4);
|
|
lgp->lg_maxcount = be32_to_cpup(p++);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_layoutcommit *lcp)
|
|
{
|
|
DECODE_HEAD;
|
|
u32 timechange;
|
|
|
|
READ_BUF(20);
|
|
p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
|
|
p = xdr_decode_hyper(p, &lcp->lc_seg.length);
|
|
lcp->lc_reclaim = be32_to_cpup(p++);
|
|
|
|
status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
|
|
if (status)
|
|
return status;
|
|
|
|
READ_BUF(4);
|
|
lcp->lc_newoffset = be32_to_cpup(p++);
|
|
if (lcp->lc_newoffset) {
|
|
READ_BUF(8);
|
|
p = xdr_decode_hyper(p, &lcp->lc_last_wr);
|
|
} else
|
|
lcp->lc_last_wr = 0;
|
|
READ_BUF(4);
|
|
timechange = be32_to_cpup(p++);
|
|
if (timechange) {
|
|
status = nfsd4_decode_time(argp, &lcp->lc_mtime);
|
|
if (status)
|
|
return status;
|
|
} else {
|
|
lcp->lc_mtime.tv_nsec = UTIME_NOW;
|
|
}
|
|
READ_BUF(8);
|
|
lcp->lc_layout_type = be32_to_cpup(p++);
|
|
|
|
/*
|
|
* Save the layout update in XDR format and let the layout driver deal
|
|
* with it later.
|
|
*/
|
|
lcp->lc_up_len = be32_to_cpup(p++);
|
|
if (lcp->lc_up_len > 0) {
|
|
READ_BUF(lcp->lc_up_len);
|
|
READMEM(lcp->lc_up_layout, lcp->lc_up_len);
|
|
}
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_layoutreturn *lrp)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(16);
|
|
lrp->lr_reclaim = be32_to_cpup(p++);
|
|
lrp->lr_layout_type = be32_to_cpup(p++);
|
|
lrp->lr_seg.iomode = be32_to_cpup(p++);
|
|
lrp->lr_return_type = be32_to_cpup(p++);
|
|
if (lrp->lr_return_type == RETURN_FILE) {
|
|
READ_BUF(16);
|
|
p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
|
|
p = xdr_decode_hyper(p, &lrp->lr_seg.length);
|
|
|
|
status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
|
|
if (status)
|
|
return status;
|
|
|
|
READ_BUF(4);
|
|
lrp->lrf_body_len = be32_to_cpup(p++);
|
|
if (lrp->lrf_body_len > 0) {
|
|
READ_BUF(lrp->lrf_body_len);
|
|
READMEM(lrp->lrf_body, lrp->lrf_body_len);
|
|
}
|
|
} else {
|
|
lrp->lr_seg.offset = 0;
|
|
lrp->lr_seg.length = NFS4_MAX_UINT64;
|
|
}
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
#endif /* CONFIG_NFSD_PNFS */
|
|
|
|
static __be32
|
|
nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_fallocate *fallocate)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
|
|
if (status)
|
|
return status;
|
|
|
|
READ_BUF(16);
|
|
p = xdr_decode_hyper(p, &fallocate->falloc_offset);
|
|
xdr_decode_hyper(p, &fallocate->falloc_length);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
|
|
if (status)
|
|
return status;
|
|
status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
|
|
if (status)
|
|
return status;
|
|
|
|
READ_BUF(8 + 8 + 8);
|
|
p = xdr_decode_hyper(p, &clone->cl_src_pos);
|
|
p = xdr_decode_hyper(p, &clone->cl_dst_pos);
|
|
p = xdr_decode_hyper(p, &clone->cl_count);
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
|
|
struct nl4_server *ns)
|
|
{
|
|
DECODE_HEAD;
|
|
struct nfs42_netaddr *naddr;
|
|
|
|
READ_BUF(4);
|
|
ns->nl4_type = be32_to_cpup(p++);
|
|
|
|
/* currently support for 1 inter-server source server */
|
|
switch (ns->nl4_type) {
|
|
case NL4_NETADDR:
|
|
naddr = &ns->u.nl4_addr;
|
|
|
|
READ_BUF(4);
|
|
naddr->netid_len = be32_to_cpup(p++);
|
|
if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
|
|
goto xdr_error;
|
|
|
|
READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
|
|
COPYMEM(naddr->netid, naddr->netid_len);
|
|
|
|
naddr->addr_len = be32_to_cpup(p++);
|
|
if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
|
|
goto xdr_error;
|
|
|
|
READ_BUF(naddr->addr_len);
|
|
COPYMEM(naddr->addr, naddr->addr_len);
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
|
|
{
|
|
DECODE_HEAD;
|
|
struct nl4_server *ns_dummy;
|
|
int i, count;
|
|
|
|
status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
|
|
if (status)
|
|
return status;
|
|
status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
|
|
if (status)
|
|
return status;
|
|
|
|
READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
|
|
p = xdr_decode_hyper(p, ©->cp_src_pos);
|
|
p = xdr_decode_hyper(p, ©->cp_dst_pos);
|
|
p = xdr_decode_hyper(p, ©->cp_count);
|
|
p++; /* ca_consecutive: we always do consecutive copies */
|
|
copy->cp_synchronous = be32_to_cpup(p++);
|
|
|
|
count = be32_to_cpup(p++);
|
|
|
|
copy->cp_intra = false;
|
|
if (count == 0) { /* intra-server copy */
|
|
copy->cp_intra = true;
|
|
goto intra;
|
|
}
|
|
|
|
/* decode all the supplied server addresses but use first */
|
|
status = nfsd4_decode_nl4_server(argp, ©->cp_src);
|
|
if (status)
|
|
return status;
|
|
|
|
ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
|
|
if (ns_dummy == NULL)
|
|
return nfserrno(-ENOMEM);
|
|
for (i = 0; i < count - 1; i++) {
|
|
status = nfsd4_decode_nl4_server(argp, ns_dummy);
|
|
if (status) {
|
|
kfree(ns_dummy);
|
|
return status;
|
|
}
|
|
}
|
|
kfree(ns_dummy);
|
|
intra:
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_offload_status *os)
|
|
{
|
|
return nfsd4_decode_stateid(argp, &os->stateid);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_copy_notify *cn)
|
|
{
|
|
int status;
|
|
|
|
status = nfsd4_decode_stateid(argp, &cn->cpn_src_stateid);
|
|
if (status)
|
|
return status;
|
|
return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
|
|
if (status)
|
|
return status;
|
|
|
|
READ_BUF(8 + 4);
|
|
p = xdr_decode_hyper(p, &seek->seek_offset);
|
|
seek->seek_whence = be32_to_cpup(p);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
|
|
{
|
|
return nfs_ok;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
|
|
{
|
|
return nfserr_notsupp;
|
|
}
|
|
|
|
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
|
|
|
|
static const nfsd4_dec nfsd4_dec_ops[] = {
|
|
[OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
|
|
[OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
|
|
[OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
|
|
[OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
|
|
[OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
|
|
[OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
|
|
[OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
|
|
[OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
|
|
[OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
|
|
[OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
|
|
[OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
|
|
[OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
|
|
[OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
|
|
[OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
|
|
[OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
|
|
[OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
|
|
[OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
|
|
[OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_READ] = (nfsd4_dec)nfsd4_decode_read,
|
|
[OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
|
|
[OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
|
|
[OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
|
|
[OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
|
|
[OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
|
|
[OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
|
|
[OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
|
|
[OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
|
|
[OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
|
|
[OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
|
|
[OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
|
|
|
|
/* new operations for NFSv4.1 */
|
|
[OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
|
|
[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
|
|
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
|
|
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
|
|
[OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
|
|
[OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
|
|
[OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
#ifdef CONFIG_NFSD_PNFS
|
|
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
|
|
[OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
|
|
[OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
|
|
[OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
|
|
#else
|
|
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
#endif
|
|
[OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
|
|
[OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
|
|
[OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
|
|
[OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
|
|
[OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
|
|
|
|
/* new operations for NFSv4.2 */
|
|
[OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
|
|
[OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
|
|
[OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
|
|
[OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
|
|
[OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
|
|
[OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
|
|
[OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
|
|
[OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
|
|
};
|
|
|
|
static inline bool
|
|
nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
|
|
{
|
|
if (op->opnum < FIRST_NFS4_OP)
|
|
return false;
|
|
else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
|
|
return false;
|
|
else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
|
|
return false;
|
|
else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
|
|
{
|
|
DECODE_HEAD;
|
|
struct nfsd4_op *op;
|
|
bool cachethis = false;
|
|
int auth_slack= argp->rqstp->rq_auth_slack;
|
|
int max_reply = auth_slack + 8; /* opcnt, status */
|
|
int readcount = 0;
|
|
int readbytes = 0;
|
|
int i;
|
|
|
|
READ_BUF(4);
|
|
argp->taglen = be32_to_cpup(p++);
|
|
READ_BUF(argp->taglen);
|
|
SAVEMEM(argp->tag, argp->taglen);
|
|
READ_BUF(8);
|
|
argp->minorversion = be32_to_cpup(p++);
|
|
argp->opcnt = be32_to_cpup(p++);
|
|
max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
|
|
|
|
if (argp->taglen > NFSD4_MAX_TAGLEN)
|
|
goto xdr_error;
|
|
/*
|
|
* NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
|
|
* here, so we return success at the xdr level so that
|
|
* nfsd4_proc can handle this is an NFS-level error.
|
|
*/
|
|
if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
|
|
return 0;
|
|
|
|
if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
|
|
argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
|
|
if (!argp->ops) {
|
|
argp->ops = argp->iops;
|
|
dprintk("nfsd: couldn't allocate room for COMPOUND\n");
|
|
goto xdr_error;
|
|
}
|
|
}
|
|
|
|
if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
|
|
argp->opcnt = 0;
|
|
|
|
for (i = 0; i < argp->opcnt; i++) {
|
|
op = &argp->ops[i];
|
|
op->replay = NULL;
|
|
|
|
READ_BUF(4);
|
|
op->opnum = be32_to_cpup(p++);
|
|
|
|
if (nfsd4_opnum_in_range(argp, op))
|
|
op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
|
|
else {
|
|
op->opnum = OP_ILLEGAL;
|
|
op->status = nfserr_op_illegal;
|
|
}
|
|
op->opdesc = OPDESC(op);
|
|
/*
|
|
* We'll try to cache the result in the DRC if any one
|
|
* op in the compound wants to be cached:
|
|
*/
|
|
cachethis |= nfsd4_cache_this_op(op);
|
|
|
|
if (op->opnum == OP_READ) {
|
|
readcount++;
|
|
readbytes += nfsd4_max_reply(argp->rqstp, op);
|
|
} else
|
|
max_reply += nfsd4_max_reply(argp->rqstp, op);
|
|
/*
|
|
* OP_LOCK and OP_LOCKT may return a conflicting lock.
|
|
* (Special case because it will just skip encoding this
|
|
* if it runs out of xdr buffer space, and it is the only
|
|
* operation that behaves this way.)
|
|
*/
|
|
if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
|
|
max_reply += NFS4_OPAQUE_LIMIT;
|
|
|
|
if (op->status) {
|
|
argp->opcnt = i+1;
|
|
break;
|
|
}
|
|
}
|
|
/* Sessions make the DRC unnecessary: */
|
|
if (argp->minorversion)
|
|
cachethis = false;
|
|
svc_reserve(argp->rqstp, max_reply + readbytes);
|
|
argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
|
|
|
|
if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
|
|
clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
|
|
struct svc_export *exp)
|
|
{
|
|
if (exp->ex_flags & NFSEXP_V4ROOT) {
|
|
*p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
|
|
*p++ = 0;
|
|
} else if (IS_I_VERSION(inode)) {
|
|
p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
|
|
} else {
|
|
*p++ = cpu_to_be32(stat->ctime.tv_sec);
|
|
*p++ = cpu_to_be32(stat->ctime.tv_nsec);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* ctime (in NFSv4, time_metadata) is not writeable, and the client
|
|
* doesn't really care what resolution could theoretically be stored by
|
|
* the filesystem.
|
|
*
|
|
* The client cares how close together changes can be while still
|
|
* guaranteeing ctime changes. For most filesystems (which have
|
|
* timestamps with nanosecond fields) that is limited by the resolution
|
|
* of the time returned from current_time() (which I'm assuming to be
|
|
* 1/HZ).
|
|
*/
|
|
static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
|
|
{
|
|
struct timespec64 ts;
|
|
u32 ns;
|
|
|
|
ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
|
|
ts = ns_to_timespec64(ns);
|
|
|
|
p = xdr_encode_hyper(p, ts.tv_sec);
|
|
*p++ = cpu_to_be32(ts.tv_nsec);
|
|
|
|
return p;
|
|
}
|
|
|
|
static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
|
|
{
|
|
*p++ = cpu_to_be32(c->atomic);
|
|
if (c->change_supported) {
|
|
p = xdr_encode_hyper(p, c->before_change);
|
|
p = xdr_encode_hyper(p, c->after_change);
|
|
} else {
|
|
*p++ = cpu_to_be32(c->before_ctime_sec);
|
|
*p++ = cpu_to_be32(c->before_ctime_nsec);
|
|
*p++ = cpu_to_be32(c->after_ctime_sec);
|
|
*p++ = cpu_to_be32(c->after_ctime_nsec);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/* Encode as an array of strings the string given with components
|
|
* separated @sep, escaped with esc_enter and esc_exit.
|
|
*/
|
|
static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
|
|
char *components, char esc_enter,
|
|
char esc_exit)
|
|
{
|
|
__be32 *p;
|
|
__be32 pathlen;
|
|
int pathlen_offset;
|
|
int strlen, count=0;
|
|
char *str, *end, *next;
|
|
|
|
dprintk("nfsd4_encode_components(%s)\n", components);
|
|
|
|
pathlen_offset = xdr->buf->len;
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p++; /* We will fill this in with @count later */
|
|
|
|
end = str = components;
|
|
while (*end) {
|
|
bool found_esc = false;
|
|
|
|
/* try to parse as esc_start, ..., esc_end, sep */
|
|
if (*str == esc_enter) {
|
|
for (; *end && (*end != esc_exit); end++)
|
|
/* find esc_exit or end of string */;
|
|
next = end + 1;
|
|
if (*end && (!*next || *next == sep)) {
|
|
str++;
|
|
found_esc = true;
|
|
}
|
|
}
|
|
|
|
if (!found_esc)
|
|
for (; *end && (*end != sep); end++)
|
|
/* find sep or end of string */;
|
|
|
|
strlen = end - str;
|
|
if (strlen) {
|
|
p = xdr_reserve_space(xdr, strlen + 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_opaque(p, str, strlen);
|
|
count++;
|
|
}
|
|
else
|
|
end++;
|
|
if (found_esc)
|
|
end = next;
|
|
|
|
str = end;
|
|
}
|
|
pathlen = htonl(count);
|
|
write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
|
|
return 0;
|
|
}
|
|
|
|
/* Encode as an array of strings the string given with components
|
|
* separated @sep.
|
|
*/
|
|
static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
|
|
char *components)
|
|
{
|
|
return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
|
|
}
|
|
|
|
/*
|
|
* encode a location element of a fs_locations structure
|
|
*/
|
|
static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
|
|
struct nfsd4_fs_location *location)
|
|
{
|
|
__be32 status;
|
|
|
|
status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
|
|
'[', ']');
|
|
if (status)
|
|
return status;
|
|
status = nfsd4_encode_components(xdr, '/', location->path);
|
|
if (status)
|
|
return status;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Encode a path in RFC3530 'pathname4' format
|
|
*/
|
|
static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
|
|
const struct path *root,
|
|
const struct path *path)
|
|
{
|
|
struct path cur = *path;
|
|
__be32 *p;
|
|
struct dentry **components = NULL;
|
|
unsigned int ncomponents = 0;
|
|
__be32 err = nfserr_jukebox;
|
|
|
|
dprintk("nfsd4_encode_components(");
|
|
|
|
path_get(&cur);
|
|
/* First walk the path up to the nfsd root, and store the
|
|
* dentries/path components in an array.
|
|
*/
|
|
for (;;) {
|
|
if (path_equal(&cur, root))
|
|
break;
|
|
if (cur.dentry == cur.mnt->mnt_root) {
|
|
if (follow_up(&cur))
|
|
continue;
|
|
goto out_free;
|
|
}
|
|
if ((ncomponents & 15) == 0) {
|
|
struct dentry **new;
|
|
new = krealloc(components,
|
|
sizeof(*new) * (ncomponents + 16),
|
|
GFP_KERNEL);
|
|
if (!new)
|
|
goto out_free;
|
|
components = new;
|
|
}
|
|
components[ncomponents++] = cur.dentry;
|
|
cur.dentry = dget_parent(cur.dentry);
|
|
}
|
|
err = nfserr_resource;
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_free;
|
|
*p++ = cpu_to_be32(ncomponents);
|
|
|
|
while (ncomponents) {
|
|
struct dentry *dentry = components[ncomponents - 1];
|
|
unsigned int len;
|
|
|
|
spin_lock(&dentry->d_lock);
|
|
len = dentry->d_name.len;
|
|
p = xdr_reserve_space(xdr, len + 4);
|
|
if (!p) {
|
|
spin_unlock(&dentry->d_lock);
|
|
goto out_free;
|
|
}
|
|
p = xdr_encode_opaque(p, dentry->d_name.name, len);
|
|
dprintk("/%pd", dentry);
|
|
spin_unlock(&dentry->d_lock);
|
|
dput(dentry);
|
|
ncomponents--;
|
|
}
|
|
|
|
err = 0;
|
|
out_free:
|
|
dprintk(")\n");
|
|
while (ncomponents)
|
|
dput(components[--ncomponents]);
|
|
kfree(components);
|
|
path_put(&cur);
|
|
return err;
|
|
}
|
|
|
|
static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
|
|
struct svc_rqst *rqstp, const struct path *path)
|
|
{
|
|
struct svc_export *exp_ps;
|
|
__be32 res;
|
|
|
|
exp_ps = rqst_find_fsidzero_export(rqstp);
|
|
if (IS_ERR(exp_ps))
|
|
return nfserrno(PTR_ERR(exp_ps));
|
|
res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
|
|
exp_put(exp_ps);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* encode a fs_locations structure
|
|
*/
|
|
static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
|
|
struct svc_rqst *rqstp, struct svc_export *exp)
|
|
{
|
|
__be32 status;
|
|
int i;
|
|
__be32 *p;
|
|
struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
|
|
|
|
status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
|
|
if (status)
|
|
return status;
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(fslocs->locations_count);
|
|
for (i=0; i<fslocs->locations_count; i++) {
|
|
status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
|
|
if (status)
|
|
return status;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static u32 nfs4_file_type(umode_t mode)
|
|
{
|
|
switch (mode & S_IFMT) {
|
|
case S_IFIFO: return NF4FIFO;
|
|
case S_IFCHR: return NF4CHR;
|
|
case S_IFDIR: return NF4DIR;
|
|
case S_IFBLK: return NF4BLK;
|
|
case S_IFLNK: return NF4LNK;
|
|
case S_IFREG: return NF4REG;
|
|
case S_IFSOCK: return NF4SOCK;
|
|
default: return NF4BAD;
|
|
};
|
|
}
|
|
|
|
static inline __be32
|
|
nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
|
|
struct nfs4_ace *ace)
|
|
{
|
|
if (ace->whotype != NFS4_ACL_WHO_NAMED)
|
|
return nfs4_acl_write_who(xdr, ace->whotype);
|
|
else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
|
|
return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
|
|
else
|
|
return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
|
|
}
|
|
|
|
static inline __be32
|
|
nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
|
|
{
|
|
__be32 *p;
|
|
unsigned long i = hweight_long(layout_types);
|
|
|
|
p = xdr_reserve_space(xdr, 4 + 4 * i);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
*p++ = cpu_to_be32(i);
|
|
|
|
for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
|
|
if (layout_types & (1 << i))
|
|
*p++ = cpu_to_be32(i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
|
|
FATTR4_WORD0_RDATTR_ERROR)
|
|
#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
|
|
#define WORD2_ABSENT_FS_ATTRS 0
|
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
static inline __be32
|
|
nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
|
|
void *context, int len)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
/*
|
|
* For now we use a 0 here to indicate the null translation; in
|
|
* the future we may place a call to translation code here.
|
|
*/
|
|
*p++ = cpu_to_be32(0); /* lfs */
|
|
*p++ = cpu_to_be32(0); /* pi */
|
|
p = xdr_encode_opaque(p, context, len);
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline __be32
|
|
nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
|
|
void *context, int len)
|
|
{ return 0; }
|
|
#endif
|
|
|
|
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
|
|
{
|
|
/* As per referral draft: */
|
|
if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
|
|
*bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
|
|
if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
|
|
*bmval0 & FATTR4_WORD0_FS_LOCATIONS)
|
|
*rdattr_err = NFSERR_MOVED;
|
|
else
|
|
return nfserr_moved;
|
|
}
|
|
*bmval0 &= WORD0_ABSENT_FS_ATTRS;
|
|
*bmval1 &= WORD1_ABSENT_FS_ATTRS;
|
|
*bmval2 &= WORD2_ABSENT_FS_ATTRS;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
|
|
{
|
|
struct path path = exp->ex_path;
|
|
int err;
|
|
|
|
path_get(&path);
|
|
while (follow_up(&path)) {
|
|
if (path.dentry != path.mnt->mnt_root)
|
|
break;
|
|
}
|
|
err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
|
|
path_put(&path);
|
|
return err;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (bmval2) {
|
|
p = xdr_reserve_space(xdr, 16);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(3);
|
|
*p++ = cpu_to_be32(bmval0);
|
|
*p++ = cpu_to_be32(bmval1);
|
|
*p++ = cpu_to_be32(bmval2);
|
|
} else if (bmval1) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(2);
|
|
*p++ = cpu_to_be32(bmval0);
|
|
*p++ = cpu_to_be32(bmval1);
|
|
} else {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
*p++ = cpu_to_be32(bmval0);
|
|
}
|
|
|
|
return 0;
|
|
out_resource:
|
|
return nfserr_resource;
|
|
}
|
|
|
|
/*
|
|
* Note: @fhp can be NULL; in this case, we might have to compose the filehandle
|
|
* ourselves.
|
|
*/
|
|
static __be32
|
|
nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
|
|
struct svc_export *exp,
|
|
struct dentry *dentry, u32 *bmval,
|
|
struct svc_rqst *rqstp, int ignore_crossmnt)
|
|
{
|
|
u32 bmval0 = bmval[0];
|
|
u32 bmval1 = bmval[1];
|
|
u32 bmval2 = bmval[2];
|
|
struct kstat stat;
|
|
struct svc_fh *tempfh = NULL;
|
|
struct kstatfs statfs;
|
|
__be32 *p;
|
|
int starting_len = xdr->buf->len;
|
|
int attrlen_offset;
|
|
__be32 attrlen;
|
|
u32 dummy;
|
|
u64 dummy64;
|
|
u32 rdattr_err = 0;
|
|
__be32 status;
|
|
int err;
|
|
struct nfs4_acl *acl = NULL;
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
void *context = NULL;
|
|
int contextlen;
|
|
#endif
|
|
bool contextsupport = false;
|
|
struct nfsd4_compoundres *resp = rqstp->rq_resp;
|
|
u32 minorversion = resp->cstate.minorversion;
|
|
struct path path = {
|
|
.mnt = exp->ex_path.mnt,
|
|
.dentry = dentry,
|
|
};
|
|
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
|
|
|
|
BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
|
|
BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
|
|
|
|
if (exp->ex_fslocs.migrated) {
|
|
status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
|
|
if (err)
|
|
goto out_nfserr;
|
|
if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
|
|
FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
|
|
(bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
|
|
FATTR4_WORD1_SPACE_TOTAL))) {
|
|
err = vfs_statfs(&path, &statfs);
|
|
if (err)
|
|
goto out_nfserr;
|
|
}
|
|
if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
|
|
tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
|
|
status = nfserr_jukebox;
|
|
if (!tempfh)
|
|
goto out;
|
|
fh_init(tempfh, NFS4_FHSIZE);
|
|
status = fh_compose(tempfh, exp, dentry, NULL);
|
|
if (status)
|
|
goto out;
|
|
fhp = tempfh;
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_ACL) {
|
|
err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
|
|
if (err == -EOPNOTSUPP)
|
|
bmval0 &= ~FATTR4_WORD0_ACL;
|
|
else if (err == -EINVAL) {
|
|
status = nfserr_attrnotsupp;
|
|
goto out;
|
|
} else if (err != 0)
|
|
goto out_nfserr;
|
|
}
|
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
|
|
bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
|
|
if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
|
|
err = security_inode_getsecctx(d_inode(dentry),
|
|
&context, &contextlen);
|
|
else
|
|
err = -EOPNOTSUPP;
|
|
contextsupport = (err == 0);
|
|
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
|
|
if (err == -EOPNOTSUPP)
|
|
bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
|
|
else if (err)
|
|
goto out_nfserr;
|
|
}
|
|
}
|
|
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
|
|
|
|
status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
|
|
if (status)
|
|
goto out;
|
|
|
|
attrlen_offset = xdr->buf->len;
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
p++; /* to be backfilled later */
|
|
|
|
if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
|
|
u32 supp[3];
|
|
|
|
memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
|
|
|
|
if (!IS_POSIXACL(dentry->d_inode))
|
|
supp[0] &= ~FATTR4_WORD0_ACL;
|
|
if (!contextsupport)
|
|
supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
|
|
if (!supp[2]) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(2);
|
|
*p++ = cpu_to_be32(supp[0]);
|
|
*p++ = cpu_to_be32(supp[1]);
|
|
} else {
|
|
p = xdr_reserve_space(xdr, 16);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(3);
|
|
*p++ = cpu_to_be32(supp[0]);
|
|
*p++ = cpu_to_be32(supp[1]);
|
|
*p++ = cpu_to_be32(supp[2]);
|
|
}
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_TYPE) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
dummy = nfs4_file_type(stat.mode);
|
|
if (dummy == NF4BAD) {
|
|
status = nfserr_serverfault;
|
|
goto out;
|
|
}
|
|
*p++ = cpu_to_be32(dummy);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
|
|
*p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
|
|
else
|
|
*p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
|
|
NFS4_FH_VOL_RENAME);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CHANGE) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = encode_change(p, &stat, d_inode(dentry), exp);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_SIZE) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, stat.size);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FSID) {
|
|
p = xdr_reserve_space(xdr, 16);
|
|
if (!p)
|
|
goto out_resource;
|
|
if (exp->ex_fslocs.migrated) {
|
|
p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
|
|
p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
|
|
} else switch(fsid_source(fhp)) {
|
|
case FSIDSOURCE_FSID:
|
|
p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
|
|
p = xdr_encode_hyper(p, (u64)0);
|
|
break;
|
|
case FSIDSOURCE_DEV:
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(MAJOR(stat.dev));
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(MINOR(stat.dev));
|
|
break;
|
|
case FSIDSOURCE_UUID:
|
|
p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
|
|
EX_UUID_LEN);
|
|
break;
|
|
}
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(nn->nfsd4_lease);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(rdattr_err);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_ACL) {
|
|
struct nfs4_ace *ace;
|
|
|
|
if (acl == NULL) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
|
|
*p++ = cpu_to_be32(0);
|
|
goto out_acl;
|
|
}
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(acl->naces);
|
|
|
|
for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
|
|
p = xdr_reserve_space(xdr, 4*3);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(ace->type);
|
|
*p++ = cpu_to_be32(ace->flag);
|
|
*p++ = cpu_to_be32(ace->access_mask &
|
|
NFS4_ACE_MASK_ALL);
|
|
status = nfsd4_encode_aclname(xdr, rqstp, ace);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
}
|
|
out_acl:
|
|
if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
|
|
ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CANSETTIME) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
|
|
p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
|
|
fhp->fh_handle.fh_size);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILEID) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, stat.ino);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILES_FREE) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (u64) statfs.f_files);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
|
|
status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXLINK) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(255);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXNAME) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(statfs.f_namelen);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXREAD) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXWRITE) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_MODE) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(stat.mode & S_IALLUGO);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(1);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_NUMLINKS) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(stat.nlink);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_OWNER) {
|
|
status = nfsd4_encode_user(xdr, rqstp, stat.uid);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
|
|
status = nfsd4_encode_group(xdr, rqstp, stat.gid);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_RAWDEV) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
|
|
*p++ = cpu_to_be32((u32) MINOR(stat.rdev));
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
|
|
p = xdr_encode_hyper(p, dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
|
|
p = xdr_encode_hyper(p, dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
|
|
p = xdr_encode_hyper(p, dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_USED) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
dummy64 = (u64)stat.blocks << 9;
|
|
p = xdr_encode_hyper(p, dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
|
|
*p++ = cpu_to_be32(stat.atime.tv_nsec);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = encode_time_delta(p, d_inode(dentry));
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
|
|
*p++ = cpu_to_be32(stat.ctime.tv_nsec);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (!p)
|
|
goto out_resource;
|
|
p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
|
|
*p++ = cpu_to_be32(stat.mtime.tv_nsec);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
|
|
struct kstat parent_stat;
|
|
u64 ino = stat.ino;
|
|
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
goto out_resource;
|
|
/*
|
|
* Get parent's attributes if not ignoring crossmount
|
|
* and this is the root of a cross-mounted filesystem.
|
|
*/
|
|
if (ignore_crossmnt == 0 &&
|
|
dentry == exp->ex_path.mnt->mnt_root) {
|
|
err = get_parent_attributes(exp, &parent_stat);
|
|
if (err)
|
|
goto out_nfserr;
|
|
ino = parent_stat.ino;
|
|
}
|
|
p = xdr_encode_hyper(p, ino);
|
|
}
|
|
#ifdef CONFIG_NFSD_PNFS
|
|
if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
|
|
status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
|
|
status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
*p++ = cpu_to_be32(stat.blksize);
|
|
}
|
|
#endif /* CONFIG_NFSD_PNFS */
|
|
if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
|
|
u32 supp[3];
|
|
|
|
memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
|
|
supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
|
|
supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
|
|
supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
|
|
|
|
status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto out_resource;
|
|
if (IS_I_VERSION(d_inode(dentry)))
|
|
*p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
|
|
else
|
|
*p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
|
|
}
|
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
|
|
status = nfsd4_encode_security_label(xdr, rqstp, context,
|
|
contextlen);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
#endif
|
|
|
|
attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
|
|
write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
|
|
status = nfs_ok;
|
|
|
|
out:
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
if (context)
|
|
security_release_secctx(context, contextlen);
|
|
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
|
|
kfree(acl);
|
|
if (tempfh) {
|
|
fh_put(tempfh);
|
|
kfree(tempfh);
|
|
}
|
|
if (status)
|
|
xdr_truncate_encode(xdr, starting_len);
|
|
return status;
|
|
out_nfserr:
|
|
status = nfserrno(err);
|
|
goto out;
|
|
out_resource:
|
|
status = nfserr_resource;
|
|
goto out;
|
|
}
|
|
|
|
static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
|
|
struct xdr_buf *buf, __be32 *p, int bytes)
|
|
{
|
|
xdr->scratch.iov_len = 0;
|
|
memset(buf, 0, sizeof(struct xdr_buf));
|
|
buf->head[0].iov_base = p;
|
|
buf->head[0].iov_len = 0;
|
|
buf->len = 0;
|
|
xdr->buf = buf;
|
|
xdr->iov = buf->head;
|
|
xdr->p = p;
|
|
xdr->end = (void *)p + bytes;
|
|
buf->buflen = bytes;
|
|
}
|
|
|
|
__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
|
|
struct svc_fh *fhp, struct svc_export *exp,
|
|
struct dentry *dentry, u32 *bmval,
|
|
struct svc_rqst *rqstp, int ignore_crossmnt)
|
|
{
|
|
struct xdr_buf dummy;
|
|
struct xdr_stream xdr;
|
|
__be32 ret;
|
|
|
|
svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
|
|
ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
|
|
ignore_crossmnt);
|
|
*p = xdr.p;
|
|
return ret;
|
|
}
|
|
|
|
static inline int attributes_need_mount(u32 *bmval)
|
|
{
|
|
if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
|
|
return 1;
|
|
if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
|
|
const char *name, int namlen)
|
|
{
|
|
struct svc_export *exp = cd->rd_fhp->fh_export;
|
|
struct dentry *dentry;
|
|
__be32 nfserr;
|
|
int ignore_crossmnt = 0;
|
|
|
|
dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
|
|
if (IS_ERR(dentry))
|
|
return nfserrno(PTR_ERR(dentry));
|
|
|
|
exp_get(exp);
|
|
/*
|
|
* In the case of a mountpoint, the client may be asking for
|
|
* attributes that are only properties of the underlying filesystem
|
|
* as opposed to the cross-mounted file system. In such a case,
|
|
* we will not follow the cross mount and will fill the attribtutes
|
|
* directly from the mountpoint dentry.
|
|
*/
|
|
if (nfsd_mountpoint(dentry, exp)) {
|
|
int err;
|
|
|
|
if (!(exp->ex_flags & NFSEXP_V4ROOT)
|
|
&& !attributes_need_mount(cd->rd_bmval)) {
|
|
ignore_crossmnt = 1;
|
|
goto out_encode;
|
|
}
|
|
/*
|
|
* Why the heck aren't we just using nfsd_lookup??
|
|
* Different "."/".." handling? Something else?
|
|
* At least, add a comment here to explain....
|
|
*/
|
|
err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
|
|
if (err) {
|
|
nfserr = nfserrno(err);
|
|
goto out_put;
|
|
}
|
|
nfserr = check_nfsd_access(exp, cd->rd_rqstp);
|
|
if (nfserr)
|
|
goto out_put;
|
|
|
|
}
|
|
out_encode:
|
|
nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
|
|
cd->rd_rqstp, ignore_crossmnt);
|
|
out_put:
|
|
dput(dentry);
|
|
exp_put(exp);
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32 *
|
|
nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 20);
|
|
if (!p)
|
|
return NULL;
|
|
*p++ = htonl(2);
|
|
*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
|
|
*p++ = htonl(0); /* bmval1 */
|
|
|
|
*p++ = htonl(4); /* attribute length */
|
|
*p++ = nfserr; /* no htonl */
|
|
return p;
|
|
}
|
|
|
|
static int
|
|
nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
struct readdir_cd *ccd = ccdv;
|
|
struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
|
|
struct xdr_stream *xdr = cd->xdr;
|
|
int start_offset = xdr->buf->len;
|
|
int cookie_offset;
|
|
u32 name_and_cookie;
|
|
int entry_bytes;
|
|
__be32 nfserr = nfserr_toosmall;
|
|
__be64 wire_offset;
|
|
__be32 *p;
|
|
|
|
/* In nfsv4, "." and ".." never make it onto the wire.. */
|
|
if (name && isdotent(name, namlen)) {
|
|
cd->common.err = nfs_ok;
|
|
return 0;
|
|
}
|
|
|
|
if (cd->cookie_offset) {
|
|
wire_offset = cpu_to_be64(offset);
|
|
write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
|
|
&wire_offset, 8);
|
|
}
|
|
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
goto fail;
|
|
*p++ = xdr_one; /* mark entry present */
|
|
cookie_offset = xdr->buf->len;
|
|
p = xdr_reserve_space(xdr, 3*4 + namlen);
|
|
if (!p)
|
|
goto fail;
|
|
p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
|
|
p = xdr_encode_array(p, name, namlen); /* name length & name */
|
|
|
|
nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
|
|
switch (nfserr) {
|
|
case nfs_ok:
|
|
break;
|
|
case nfserr_resource:
|
|
nfserr = nfserr_toosmall;
|
|
goto fail;
|
|
case nfserr_noent:
|
|
xdr_truncate_encode(xdr, start_offset);
|
|
goto skip_entry;
|
|
default:
|
|
/*
|
|
* If the client requested the RDATTR_ERROR attribute,
|
|
* we stuff the error code into this attribute
|
|
* and continue. If this attribute was not requested,
|
|
* then in accordance with the spec, we fail the
|
|
* entire READDIR operation(!)
|
|
*/
|
|
if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
|
|
goto fail;
|
|
p = nfsd4_encode_rdattr_error(xdr, nfserr);
|
|
if (p == NULL) {
|
|
nfserr = nfserr_toosmall;
|
|
goto fail;
|
|
}
|
|
}
|
|
nfserr = nfserr_toosmall;
|
|
entry_bytes = xdr->buf->len - start_offset;
|
|
if (entry_bytes > cd->rd_maxcount)
|
|
goto fail;
|
|
cd->rd_maxcount -= entry_bytes;
|
|
/*
|
|
* RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
|
|
* let's always let through the first entry, at least:
|
|
*/
|
|
if (!cd->rd_dircount)
|
|
goto fail;
|
|
name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
|
|
if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
|
|
goto fail;
|
|
cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
|
|
|
|
cd->cookie_offset = cookie_offset;
|
|
skip_entry:
|
|
cd->common.err = nfs_ok;
|
|
return 0;
|
|
fail:
|
|
xdr_truncate_encode(xdr, start_offset);
|
|
cd->common.err = nfserr;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, sizeof(stateid_t));
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(sid->si_generation);
|
|
p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
|
|
sizeof(stateid_opaque_t));
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(access->ac_supported);
|
|
*p++ = cpu_to_be32(access->ac_resp_access);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
|
|
NFS4_MAX_SESSIONID_LEN);
|
|
*p++ = cpu_to_be32(bcts->dir);
|
|
/* Upshifting from TCP to RDMA is not supported */
|
|
*p++ = cpu_to_be32(0);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
return nfsd4_encode_stateid(xdr, &close->cl_stateid);
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
|
|
NFS4_VERIFIER_SIZE);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 20);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
encode_cinfo(p, &create->cr_cinfo);
|
|
return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
|
|
create->cr_bmval[1], create->cr_bmval[2]);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
|
|
{
|
|
struct svc_fh *fhp = getattr->ga_fhp;
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
|
|
getattr->ga_bmval, resp->rqstp, 0);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
struct svc_fh *fhp = *fhpp;
|
|
unsigned int len;
|
|
__be32 *p;
|
|
|
|
len = fhp->fh_handle.fh_size;
|
|
p = xdr_reserve_space(xdr, len + 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Including all fields other than the name, a LOCK4denied structure requires
|
|
* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
|
|
*/
|
|
static __be32
|
|
nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
|
|
{
|
|
struct xdr_netobj *conf = &ld->ld_owner;
|
|
__be32 *p;
|
|
|
|
again:
|
|
p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
|
|
if (!p) {
|
|
/*
|
|
* Don't fail to return the result just because we can't
|
|
* return the conflicting open:
|
|
*/
|
|
if (conf->len) {
|
|
kfree(conf->data);
|
|
conf->len = 0;
|
|
conf->data = NULL;
|
|
goto again;
|
|
}
|
|
return nfserr_resource;
|
|
}
|
|
p = xdr_encode_hyper(p, ld->ld_start);
|
|
p = xdr_encode_hyper(p, ld->ld_length);
|
|
*p++ = cpu_to_be32(ld->ld_type);
|
|
if (conf->len) {
|
|
p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
|
|
p = xdr_encode_opaque(p, conf->data, conf->len);
|
|
kfree(conf->data);
|
|
} else { /* non - nfsv4 lock in conflict, no clientid nor owner */
|
|
p = xdr_encode_hyper(p, (u64)0); /* clientid */
|
|
*p++ = cpu_to_be32(0); /* length of owner name */
|
|
}
|
|
return nfserr_denied;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
if (!nfserr)
|
|
nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
|
|
else if (nfserr == nfserr_denied)
|
|
nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
if (nfserr == nfserr_denied)
|
|
nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 20);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = encode_cinfo(p, &link->li_cinfo);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
|
|
if (nfserr)
|
|
return nfserr;
|
|
p = xdr_reserve_space(xdr, 24);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = encode_cinfo(p, &open->op_cinfo);
|
|
*p++ = cpu_to_be32(open->op_rflags);
|
|
|
|
nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
|
|
open->op_bmval[2]);
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
*p++ = cpu_to_be32(open->op_delegate_type);
|
|
switch (open->op_delegate_type) {
|
|
case NFS4_OPEN_DELEGATE_NONE:
|
|
break;
|
|
case NFS4_OPEN_DELEGATE_READ:
|
|
nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
|
|
if (nfserr)
|
|
return nfserr;
|
|
p = xdr_reserve_space(xdr, 20);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(open->op_recall);
|
|
|
|
/*
|
|
* TODO: ACE's in delegations
|
|
*/
|
|
*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
|
|
break;
|
|
case NFS4_OPEN_DELEGATE_WRITE:
|
|
nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
|
|
if (nfserr)
|
|
return nfserr;
|
|
p = xdr_reserve_space(xdr, 32);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(0);
|
|
|
|
/*
|
|
* TODO: space_limit's in delegations
|
|
*/
|
|
*p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
|
|
*p++ = cpu_to_be32(~(u32)0);
|
|
*p++ = cpu_to_be32(~(u32)0);
|
|
|
|
/*
|
|
* TODO: ACE's in delegations
|
|
*/
|
|
*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
|
|
break;
|
|
case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
|
|
switch (open->op_why_no_deleg) {
|
|
case WND4_CONTENTION:
|
|
case WND4_RESOURCE:
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(open->op_why_no_deleg);
|
|
/* deleg signaling not supported yet: */
|
|
*p++ = cpu_to_be32(0);
|
|
break;
|
|
default:
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(open->op_why_no_deleg);
|
|
}
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
/* XXX save filehandle here */
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
return nfsd4_encode_stateid(xdr, &od->od_stateid);
|
|
}
|
|
|
|
static __be32 nfsd4_encode_splice_read(
|
|
struct nfsd4_compoundres *resp,
|
|
struct nfsd4_read *read,
|
|
struct file *file, unsigned long maxcount)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
struct xdr_buf *buf = xdr->buf;
|
|
u32 eof;
|
|
int space_left;
|
|
__be32 nfserr;
|
|
__be32 *p = xdr->p - 2;
|
|
|
|
/* Make sure there will be room for padding if needed */
|
|
if (xdr->end - xdr->p < 1)
|
|
return nfserr_resource;
|
|
|
|
nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
|
|
file, read->rd_offset, &maxcount, &eof);
|
|
read->rd_length = maxcount;
|
|
if (nfserr) {
|
|
/*
|
|
* nfsd_splice_actor may have already messed with the
|
|
* page length; reset it so as not to confuse
|
|
* xdr_truncate_encode:
|
|
*/
|
|
buf->page_len = 0;
|
|
return nfserr;
|
|
}
|
|
|
|
*(p++) = htonl(eof);
|
|
*(p++) = htonl(maxcount);
|
|
|
|
buf->page_len = maxcount;
|
|
buf->len += maxcount;
|
|
xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
|
|
/ PAGE_SIZE;
|
|
|
|
/* Use rest of head for padding and remaining ops: */
|
|
buf->tail[0].iov_base = xdr->p;
|
|
buf->tail[0].iov_len = 0;
|
|
xdr->iov = buf->tail;
|
|
if (maxcount&3) {
|
|
int pad = 4 - (maxcount&3);
|
|
|
|
*(xdr->p++) = 0;
|
|
|
|
buf->tail[0].iov_base += maxcount&3;
|
|
buf->tail[0].iov_len = pad;
|
|
buf->len += pad;
|
|
}
|
|
|
|
space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
|
|
buf->buflen - buf->len);
|
|
buf->buflen = buf->len + space_left;
|
|
xdr->end = (__be32 *)((void *)xdr->end + space_left);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
|
|
struct nfsd4_read *read,
|
|
struct file *file, unsigned long maxcount)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
u32 eof;
|
|
int v;
|
|
int starting_len = xdr->buf->len - 8;
|
|
long len;
|
|
int thislen;
|
|
__be32 nfserr;
|
|
__be32 tmp;
|
|
__be32 *p;
|
|
u32 zzz = 0;
|
|
int pad;
|
|
|
|
len = maxcount;
|
|
v = 0;
|
|
|
|
thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
|
|
p = xdr_reserve_space(xdr, (thislen+3)&~3);
|
|
WARN_ON_ONCE(!p);
|
|
resp->rqstp->rq_vec[v].iov_base = p;
|
|
resp->rqstp->rq_vec[v].iov_len = thislen;
|
|
v++;
|
|
len -= thislen;
|
|
|
|
while (len) {
|
|
thislen = min_t(long, len, PAGE_SIZE);
|
|
p = xdr_reserve_space(xdr, (thislen+3)&~3);
|
|
WARN_ON_ONCE(!p);
|
|
resp->rqstp->rq_vec[v].iov_base = p;
|
|
resp->rqstp->rq_vec[v].iov_len = thislen;
|
|
v++;
|
|
len -= thislen;
|
|
}
|
|
read->rd_vlen = v;
|
|
|
|
len = maxcount;
|
|
nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
|
|
resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
|
|
&eof);
|
|
read->rd_length = maxcount;
|
|
if (nfserr)
|
|
return nfserr;
|
|
xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
|
|
|
|
tmp = htonl(eof);
|
|
write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
|
|
tmp = htonl(maxcount);
|
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
|
|
|
|
pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
|
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
|
|
&zzz, pad);
|
|
return 0;
|
|
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_read *read)
|
|
{
|
|
unsigned long maxcount;
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
struct file *file;
|
|
int starting_len = xdr->buf->len;
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
file = read->rd_nf->nf_file;
|
|
|
|
p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
|
|
if (!p) {
|
|
WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
|
|
return nfserr_resource;
|
|
}
|
|
if (resp->xdr.buf->page_len &&
|
|
test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
|
|
WARN_ON_ONCE(1);
|
|
return nfserr_resource;
|
|
}
|
|
xdr_commit_encode(xdr);
|
|
|
|
maxcount = svc_max_payload(resp->rqstp);
|
|
maxcount = min_t(unsigned long, maxcount,
|
|
(xdr->buf->buflen - xdr->buf->len));
|
|
maxcount = min_t(unsigned long, maxcount, read->rd_length);
|
|
|
|
if (file->f_op->splice_read &&
|
|
test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
|
|
nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
|
|
else
|
|
nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
|
|
|
|
if (nfserr)
|
|
xdr_truncate_encode(xdr, starting_len);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
|
|
{
|
|
int maxcount;
|
|
__be32 wire_count;
|
|
int zero = 0;
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
int length_offset = xdr->buf->len;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
maxcount = PAGE_SIZE;
|
|
|
|
p = xdr_reserve_space(xdr, maxcount);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
/*
|
|
* XXX: By default, vfs_readlink() will truncate symlinks if they
|
|
* would overflow the buffer. Is this kosher in NFSv4? If not, one
|
|
* easy fix is: if vfs_readlink() precisely fills the buffer, assume
|
|
* that truncation occurred, and return NFS4ERR_RESOURCE.
|
|
*/
|
|
nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
|
|
(char *)p, &maxcount);
|
|
if (nfserr == nfserr_isdir)
|
|
nfserr = nfserr_inval;
|
|
if (nfserr) {
|
|
xdr_truncate_encode(xdr, length_offset);
|
|
return nfserr;
|
|
}
|
|
|
|
wire_count = htonl(maxcount);
|
|
write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
|
|
xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
|
|
if (maxcount & 3)
|
|
write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
|
|
&zero, 4 - (maxcount&3));
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
|
|
{
|
|
int maxcount;
|
|
int bytes_left;
|
|
loff_t offset;
|
|
__be64 wire_offset;
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
int starting_len = xdr->buf->len;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0);
|
|
resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
|
|
- (char *)resp->xdr.buf->head[0].iov_base;
|
|
|
|
/*
|
|
* Number of bytes left for directory entries allowing for the
|
|
* final 8 bytes of the readdir and a following failed op:
|
|
*/
|
|
bytes_left = xdr->buf->buflen - xdr->buf->len
|
|
- COMPOUND_ERR_SLACK_SPACE - 8;
|
|
if (bytes_left < 0) {
|
|
nfserr = nfserr_resource;
|
|
goto err_no_verf;
|
|
}
|
|
maxcount = svc_max_payload(resp->rqstp);
|
|
maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
|
|
/*
|
|
* Note the rfc defines rd_maxcount as the size of the
|
|
* READDIR4resok structure, which includes the verifier above
|
|
* and the 8 bytes encoded at the end of this function:
|
|
*/
|
|
if (maxcount < 16) {
|
|
nfserr = nfserr_toosmall;
|
|
goto err_no_verf;
|
|
}
|
|
maxcount = min_t(int, maxcount-16, bytes_left);
|
|
|
|
/* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
|
|
if (!readdir->rd_dircount)
|
|
readdir->rd_dircount = svc_max_payload(resp->rqstp);
|
|
|
|
readdir->xdr = xdr;
|
|
readdir->rd_maxcount = maxcount;
|
|
readdir->common.err = 0;
|
|
readdir->cookie_offset = 0;
|
|
|
|
offset = readdir->rd_cookie;
|
|
nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
|
|
&offset,
|
|
&readdir->common, nfsd4_encode_dirent);
|
|
if (nfserr == nfs_ok &&
|
|
readdir->common.err == nfserr_toosmall &&
|
|
xdr->buf->len == starting_len + 8) {
|
|
/* nothing encoded; which limit did we hit?: */
|
|
if (maxcount - 16 < bytes_left)
|
|
/* It was the fault of rd_maxcount: */
|
|
nfserr = nfserr_toosmall;
|
|
else
|
|
/* We ran out of buffer space: */
|
|
nfserr = nfserr_resource;
|
|
}
|
|
if (nfserr)
|
|
goto err_no_verf;
|
|
|
|
if (readdir->cookie_offset) {
|
|
wire_offset = cpu_to_be64(offset);
|
|
write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
|
|
&wire_offset, 8);
|
|
}
|
|
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p) {
|
|
WARN_ON_ONCE(1);
|
|
goto err_no_verf;
|
|
}
|
|
*p++ = 0; /* no more entries */
|
|
*p++ = htonl(readdir->common.err == nfserr_eof);
|
|
|
|
return 0;
|
|
err_no_verf:
|
|
xdr_truncate_encode(xdr, starting_len);
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 20);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = encode_cinfo(p, &remove->rm_cinfo);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 40);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = encode_cinfo(p, &rename->rn_sinfo);
|
|
p = encode_cinfo(p, &rename->rn_tinfo);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
|
|
{
|
|
u32 i, nflavs, supported;
|
|
struct exp_flavor_info *flavs;
|
|
struct exp_flavor_info def_flavs[2];
|
|
__be32 *p, *flavorsp;
|
|
static bool report = true;
|
|
|
|
if (exp->ex_nflavors) {
|
|
flavs = exp->ex_flavors;
|
|
nflavs = exp->ex_nflavors;
|
|
} else { /* Handling of some defaults in absence of real secinfo: */
|
|
flavs = def_flavs;
|
|
if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
|
|
nflavs = 2;
|
|
flavs[0].pseudoflavor = RPC_AUTH_UNIX;
|
|
flavs[1].pseudoflavor = RPC_AUTH_NULL;
|
|
} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
|
|
nflavs = 1;
|
|
flavs[0].pseudoflavor
|
|
= svcauth_gss_flavor(exp->ex_client);
|
|
} else {
|
|
nflavs = 1;
|
|
flavs[0].pseudoflavor
|
|
= exp->ex_client->flavour->flavour;
|
|
}
|
|
}
|
|
|
|
supported = 0;
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
flavorsp = p++; /* to be backfilled later */
|
|
|
|
for (i = 0; i < nflavs; i++) {
|
|
rpc_authflavor_t pf = flavs[i].pseudoflavor;
|
|
struct rpcsec_gss_info info;
|
|
|
|
if (rpcauth_get_gssinfo(pf, &info) == 0) {
|
|
supported++;
|
|
p = xdr_reserve_space(xdr, 4 + 4 +
|
|
XDR_LEN(info.oid.len) + 4 + 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(RPC_AUTH_GSS);
|
|
p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
|
|
*p++ = cpu_to_be32(info.qop);
|
|
*p++ = cpu_to_be32(info.service);
|
|
} else if (pf < RPC_AUTH_MAXFLAVOR) {
|
|
supported++;
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(pf);
|
|
} else {
|
|
if (report)
|
|
pr_warn("NFS: SECINFO: security flavor %u "
|
|
"is not supported\n", pf);
|
|
}
|
|
}
|
|
|
|
if (nflavs != supported)
|
|
report = false;
|
|
*flavorsp = htonl(supported);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_secinfo *secinfo)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_secinfo_no_name *secinfo)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
|
|
}
|
|
|
|
/*
|
|
* The SETATTR encode routine is special -- it always encodes a bitmap,
|
|
* regardless of the error status.
|
|
*/
|
|
static __be32
|
|
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 16);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
if (nfserr) {
|
|
*p++ = cpu_to_be32(3);
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0);
|
|
}
|
|
else {
|
|
*p++ = cpu_to_be32(3);
|
|
*p++ = cpu_to_be32(setattr->sa_bmval[0]);
|
|
*p++ = cpu_to_be32(setattr->sa_bmval[1]);
|
|
*p++ = cpu_to_be32(setattr->sa_bmval[2]);
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
|
|
p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
|
|
NFS4_VERIFIER_SIZE);
|
|
}
|
|
else if (nfserr == nfserr_clid_inuse) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(0);
|
|
*p++ = cpu_to_be32(0);
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 16);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(write->wr_bytes_written);
|
|
*p++ = cpu_to_be32(write->wr_how_written);
|
|
p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
|
|
NFS4_VERIFIER_SIZE);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_exchange_id *exid)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
char *major_id;
|
|
char *server_scope;
|
|
int major_id_sz;
|
|
int server_scope_sz;
|
|
uint64_t minor_id = 0;
|
|
|
|
major_id = utsname()->nodename;
|
|
major_id_sz = strlen(major_id);
|
|
server_scope = utsname()->nodename;
|
|
server_scope_sz = strlen(server_scope);
|
|
|
|
p = xdr_reserve_space(xdr,
|
|
8 /* eir_clientid */ +
|
|
4 /* eir_sequenceid */ +
|
|
4 /* eir_flags */ +
|
|
4 /* spr_how */);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
|
|
*p++ = cpu_to_be32(exid->seqid);
|
|
*p++ = cpu_to_be32(exid->flags);
|
|
|
|
*p++ = cpu_to_be32(exid->spa_how);
|
|
|
|
switch (exid->spa_how) {
|
|
case SP4_NONE:
|
|
break;
|
|
case SP4_MACH_CRED:
|
|
/* spo_must_enforce bitmap: */
|
|
nfserr = nfsd4_encode_bitmap(xdr,
|
|
exid->spo_must_enforce[0],
|
|
exid->spo_must_enforce[1],
|
|
exid->spo_must_enforce[2]);
|
|
if (nfserr)
|
|
return nfserr;
|
|
/* spo_must_allow bitmap: */
|
|
nfserr = nfsd4_encode_bitmap(xdr,
|
|
exid->spo_must_allow[0],
|
|
exid->spo_must_allow[1],
|
|
exid->spo_must_allow[2]);
|
|
if (nfserr)
|
|
return nfserr;
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
p = xdr_reserve_space(xdr,
|
|
8 /* so_minor_id */ +
|
|
4 /* so_major_id.len */ +
|
|
(XDR_QUADLEN(major_id_sz) * 4) +
|
|
4 /* eir_server_scope.len */ +
|
|
(XDR_QUADLEN(server_scope_sz) * 4) +
|
|
4 /* eir_server_impl_id.count (0) */);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
/* The server_owner struct */
|
|
p = xdr_encode_hyper(p, minor_id); /* Minor id */
|
|
/* major id */
|
|
p = xdr_encode_opaque(p, major_id, major_id_sz);
|
|
|
|
/* Server scope */
|
|
p = xdr_encode_opaque(p, server_scope, server_scope_sz);
|
|
|
|
/* Implementation id */
|
|
*p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_create_session *sess)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 24);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
|
|
NFS4_MAX_SESSIONID_LEN);
|
|
*p++ = cpu_to_be32(sess->seqid);
|
|
*p++ = cpu_to_be32(sess->flags);
|
|
|
|
p = xdr_reserve_space(xdr, 28);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(0); /* headerpadsz */
|
|
*p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
|
|
*p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
|
|
*p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
|
|
*p++ = cpu_to_be32(sess->fore_channel.maxops);
|
|
*p++ = cpu_to_be32(sess->fore_channel.maxreqs);
|
|
*p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
|
|
|
|
if (sess->fore_channel.nr_rdma_attrs) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
|
|
}
|
|
|
|
p = xdr_reserve_space(xdr, 28);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(0); /* headerpadsz */
|
|
*p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
|
|
*p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
|
|
*p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
|
|
*p++ = cpu_to_be32(sess->back_channel.maxops);
|
|
*p++ = cpu_to_be32(sess->back_channel.maxreqs);
|
|
*p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
|
|
|
|
if (sess->back_channel.nr_rdma_attrs) {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_sequence *seq)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
|
|
NFS4_MAX_SESSIONID_LEN);
|
|
*p++ = cpu_to_be32(seq->seqid);
|
|
*p++ = cpu_to_be32(seq->slotid);
|
|
/* Note slotid's are numbered from zero: */
|
|
*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
|
|
*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
|
|
*p++ = cpu_to_be32(seq->status_flags);
|
|
|
|
resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_test_stateid *test_stateid)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
struct nfsd4_test_stateid_id *stateid, *next;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = htonl(test_stateid->ts_num_ids);
|
|
|
|
list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
|
|
*p++ = stateid->ts_id_status;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NFSD_PNFS
|
|
static __be32
|
|
nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_getdeviceinfo *gdev)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
const struct nfsd4_layout_ops *ops;
|
|
u32 starting_len = xdr->buf->len, needed_len;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
*p++ = cpu_to_be32(gdev->gd_layout_type);
|
|
|
|
/* If maxcount is 0 then just update notifications */
|
|
if (gdev->gd_maxcount != 0) {
|
|
ops = nfsd4_layout_ops[gdev->gd_layout_type];
|
|
nfserr = ops->encode_getdeviceinfo(xdr, gdev);
|
|
if (nfserr) {
|
|
/*
|
|
* We don't bother to burden the layout drivers with
|
|
* enforcing gd_maxcount, just tell the client to
|
|
* come back with a bigger buffer if it's not enough.
|
|
*/
|
|
if (xdr->buf->len + 4 > gdev->gd_maxcount)
|
|
goto toosmall;
|
|
return nfserr;
|
|
}
|
|
}
|
|
|
|
if (gdev->gd_notify_types) {
|
|
p = xdr_reserve_space(xdr, 4 + 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(1); /* bitmap length */
|
|
*p++ = cpu_to_be32(gdev->gd_notify_types);
|
|
} else {
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = 0;
|
|
}
|
|
|
|
return 0;
|
|
toosmall:
|
|
dprintk("%s: maxcount too small\n", __func__);
|
|
needed_len = xdr->buf->len + 4 /* notifications */;
|
|
xdr_truncate_encode(xdr, starting_len);
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(needed_len);
|
|
return nfserr_toosmall;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_layoutget *lgp)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
const struct nfsd4_layout_ops *ops;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
*p++ = cpu_to_be32(1); /* we always set return-on-close */
|
|
*p++ = cpu_to_be32(lgp->lg_sid.si_generation);
|
|
p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
|
|
sizeof(stateid_opaque_t));
|
|
|
|
*p++ = cpu_to_be32(1); /* we always return a single layout */
|
|
p = xdr_encode_hyper(p, lgp->lg_seg.offset);
|
|
p = xdr_encode_hyper(p, lgp->lg_seg.length);
|
|
*p++ = cpu_to_be32(lgp->lg_seg.iomode);
|
|
*p++ = cpu_to_be32(lgp->lg_layout_type);
|
|
|
|
ops = nfsd4_layout_ops[lgp->lg_layout_type];
|
|
return ops->encode_layoutget(xdr, lgp);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_layoutcommit *lcp)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(lcp->lc_size_chg);
|
|
if (lcp->lc_size_chg) {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_hyper(p, lcp->lc_newsize);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_layoutreturn *lrp)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
*p++ = cpu_to_be32(lrp->lrs_present);
|
|
if (lrp->lrs_present)
|
|
return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_NFSD_PNFS */
|
|
|
|
static __be32
|
|
nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
|
|
struct nfsd42_write_res *write, bool sync)
|
|
{
|
|
__be32 *p;
|
|
p = xdr_reserve_space(&resp->xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
if (sync)
|
|
*p++ = cpu_to_be32(0);
|
|
else {
|
|
__be32 nfserr;
|
|
*p++ = cpu_to_be32(1);
|
|
nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
|
|
if (nfserr)
|
|
return nfserr;
|
|
}
|
|
p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
p = xdr_encode_hyper(p, write->wr_bytes_written);
|
|
*p++ = cpu_to_be32(write->wr_stable_how);
|
|
p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
|
|
NFS4_VERIFIER_SIZE);
|
|
return nfs_ok;
|
|
}
|
|
|
|
static __be32
|
|
nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
struct nfs42_netaddr *addr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 4);
|
|
*p++ = cpu_to_be32(ns->nl4_type);
|
|
|
|
switch (ns->nl4_type) {
|
|
case NL4_NETADDR:
|
|
addr = &ns->u.nl4_addr;
|
|
|
|
/* netid_len, netid, uaddr_len, uaddr (port included
|
|
* in RPCBIND_MAXUADDRLEN)
|
|
*/
|
|
p = xdr_reserve_space(xdr,
|
|
4 /* netid len */ +
|
|
(XDR_QUADLEN(addr->netid_len) * 4) +
|
|
4 /* uaddr len */ +
|
|
(XDR_QUADLEN(addr->addr_len) * 4));
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
*p++ = cpu_to_be32(addr->netid_len);
|
|
p = xdr_encode_opaque_fixed(p, addr->netid,
|
|
addr->netid_len);
|
|
*p++ = cpu_to_be32(addr->addr_len);
|
|
p = xdr_encode_opaque_fixed(p, addr->addr,
|
|
addr->addr_len);
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
|
|
return nfserr_inval;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_copy *copy)
|
|
{
|
|
__be32 *p;
|
|
|
|
nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
|
|
copy->cp_synchronous);
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
p = xdr_reserve_space(&resp->xdr, 4 + 4);
|
|
*p++ = xdr_one; /* cr_consecutive */
|
|
*p++ = cpu_to_be32(copy->cp_synchronous);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_offload_status *os)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 8 + 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
p = xdr_encode_hyper(p, os->count);
|
|
*p++ = cpu_to_be32(0);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_copy_notify *cn)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
/* 8 sec, 4 nsec */
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
/* cnr_lease_time */
|
|
p = xdr_encode_hyper(p, cn->cpn_sec);
|
|
*p++ = cpu_to_be32(cn->cpn_nsec);
|
|
|
|
/* cnr_stateid */
|
|
nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
/* cnr_src.nl_nsvr */
|
|
p = xdr_reserve_space(xdr, 4);
|
|
if (!p)
|
|
return nfserr_resource;
|
|
|
|
*p++ = cpu_to_be32(1);
|
|
|
|
return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_seek *seek)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(&resp->xdr, 4 + 8);
|
|
*p++ = cpu_to_be32(seek->seek_eof);
|
|
p = xdr_encode_hyper(p, seek->seek_pos);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
|
|
{
|
|
return nfserr;
|
|
}
|
|
|
|
typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
|
|
|
|
/*
|
|
* Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
|
|
* since we don't need to filter out obsolete ops as this is
|
|
* done in the decoding phase.
|
|
*/
|
|
static const nfsd4_enc nfsd4_enc_ops[] = {
|
|
[OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
|
|
[OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
|
|
[OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
|
|
[OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
|
|
[OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
|
|
[OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
|
|
[OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
|
|
[OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
|
|
[OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
|
|
[OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
|
|
[OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
|
|
[OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
|
|
[OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
|
|
[OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_READ] = (nfsd4_enc)nfsd4_encode_read,
|
|
[OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
|
|
[OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
|
|
[OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
|
|
[OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
|
|
[OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
|
|
[OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
|
|
[OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
|
|
[OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
|
|
[OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
|
|
|
|
/* NFSv4.1 operations */
|
|
[OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
|
|
[OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
|
|
[OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
|
|
[OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
|
|
#ifdef CONFIG_NFSD_PNFS
|
|
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
|
|
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
|
|
[OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
|
|
[OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
|
|
#else
|
|
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
|
|
#endif
|
|
[OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
|
|
[OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
|
|
[OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
|
|
[OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
|
|
/* NFSv4.2 operations */
|
|
[OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
|
|
[OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
|
|
[OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
|
|
[OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
|
|
[OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
};
|
|
|
|
/*
|
|
* Calculate whether we still have space to encode repsize bytes.
|
|
* There are two considerations:
|
|
* - For NFS versions >=4.1, the size of the reply must stay within
|
|
* session limits
|
|
* - For all NFS versions, we must stay within limited preallocated
|
|
* buffer space.
|
|
*
|
|
* This is called before the operation is processed, so can only provide
|
|
* an upper estimate. For some nonidempotent operations (such as
|
|
* getattr), it's not necessarily a problem if that estimate is wrong,
|
|
* as we can fail it after processing without significant side effects.
|
|
*/
|
|
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
|
|
{
|
|
struct xdr_buf *buf = &resp->rqstp->rq_res;
|
|
struct nfsd4_slot *slot = resp->cstate.slot;
|
|
|
|
if (buf->len + respsize <= buf->buflen)
|
|
return nfs_ok;
|
|
if (!nfsd4_has_session(&resp->cstate))
|
|
return nfserr_resource;
|
|
if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
|
|
WARN_ON_ONCE(1);
|
|
return nfserr_rep_too_big_to_cache;
|
|
}
|
|
return nfserr_rep_too_big;
|
|
}
|
|
|
|
void
|
|
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
struct nfs4_stateowner *so = resp->cstate.replay_owner;
|
|
struct svc_rqst *rqstp = resp->rqstp;
|
|
const struct nfsd4_operation *opdesc = op->opdesc;
|
|
int post_err_offset;
|
|
nfsd4_enc encoder;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (!p) {
|
|
WARN_ON_ONCE(1);
|
|
return;
|
|
}
|
|
*p++ = cpu_to_be32(op->opnum);
|
|
post_err_offset = xdr->buf->len;
|
|
|
|
if (op->opnum == OP_ILLEGAL)
|
|
goto status;
|
|
if (op->status && opdesc &&
|
|
!(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
|
|
goto status;
|
|
BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
|
|
!nfsd4_enc_ops[op->opnum]);
|
|
encoder = nfsd4_enc_ops[op->opnum];
|
|
op->status = encoder(resp, op->status, &op->u);
|
|
if (opdesc && opdesc->op_release)
|
|
opdesc->op_release(&op->u);
|
|
xdr_commit_encode(xdr);
|
|
|
|
/* nfsd4_check_resp_size guarantees enough room for error status */
|
|
if (!op->status) {
|
|
int space_needed = 0;
|
|
if (!nfsd4_last_compound_op(rqstp))
|
|
space_needed = COMPOUND_ERR_SLACK_SPACE;
|
|
op->status = nfsd4_check_resp_size(resp, space_needed);
|
|
}
|
|
if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
|
|
struct nfsd4_slot *slot = resp->cstate.slot;
|
|
|
|
if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
|
|
op->status = nfserr_rep_too_big_to_cache;
|
|
else
|
|
op->status = nfserr_rep_too_big;
|
|
}
|
|
if (op->status == nfserr_resource ||
|
|
op->status == nfserr_rep_too_big ||
|
|
op->status == nfserr_rep_too_big_to_cache) {
|
|
/*
|
|
* The operation may have already been encoded or
|
|
* partially encoded. No op returns anything additional
|
|
* in the case of one of these three errors, so we can
|
|
* just truncate back to after the status. But it's a
|
|
* bug if we had to do this on a non-idempotent op:
|
|
*/
|
|
warn_on_nonidempotent_op(op);
|
|
xdr_truncate_encode(xdr, post_err_offset);
|
|
}
|
|
if (so) {
|
|
int len = xdr->buf->len - post_err_offset;
|
|
|
|
so->so_replay.rp_status = op->status;
|
|
so->so_replay.rp_buflen = len;
|
|
read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
|
|
so->so_replay.rp_buf, len);
|
|
}
|
|
status:
|
|
/* Note that op->status is already in network byte order: */
|
|
write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
|
|
}
|
|
|
|
/*
|
|
* Encode the reply stored in the stateowner reply cache
|
|
*
|
|
* XDR note: do not encode rp->rp_buflen: the buffer contains the
|
|
* previously sent already encoded operation.
|
|
*/
|
|
void
|
|
nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
|
|
{
|
|
__be32 *p;
|
|
struct nfs4_replay *rp = op->replay;
|
|
|
|
p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
|
|
if (!p) {
|
|
WARN_ON_ONCE(1);
|
|
return;
|
|
}
|
|
*p++ = cpu_to_be32(op->opnum);
|
|
*p++ = rp->rp_status; /* already xdr'ed */
|
|
|
|
p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
|
|
}
|
|
|
|
int
|
|
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd4_compoundargs *args = rqstp->rq_argp;
|
|
|
|
if (args->ops != args->iops) {
|
|
kfree(args->ops);
|
|
args->ops = args->iops;
|
|
}
|
|
kfree(args->tmpp);
|
|
args->tmpp = NULL;
|
|
while (args->to_free) {
|
|
struct svcxdr_tmpbuf *tb = args->to_free;
|
|
args->to_free = tb->next;
|
|
kfree(tb);
|
|
}
|
|
}
|
|
|
|
int
|
|
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct nfsd4_compoundargs *args = rqstp->rq_argp;
|
|
|
|
if (rqstp->rq_arg.head[0].iov_len % 4) {
|
|
/* client is nuts */
|
|
dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
|
|
__func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
|
|
return 0;
|
|
}
|
|
args->p = p;
|
|
args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
|
|
args->pagelist = rqstp->rq_arg.pages;
|
|
args->pagelen = rqstp->rq_arg.page_len;
|
|
args->tail = false;
|
|
args->tmpp = NULL;
|
|
args->to_free = NULL;
|
|
args->ops = args->iops;
|
|
args->rqstp = rqstp;
|
|
|
|
return !nfsd4_decode_compound(args);
|
|
}
|
|
|
|
int
|
|
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
/*
|
|
* All that remains is to write the tag and operation count...
|
|
*/
|
|
struct nfsd4_compoundres *resp = rqstp->rq_resp;
|
|
struct xdr_buf *buf = resp->xdr.buf;
|
|
|
|
WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
|
|
buf->tail[0].iov_len);
|
|
|
|
rqstp->rq_next_page = resp->xdr.page_ptr + 1;
|
|
|
|
p = resp->tagp;
|
|
*p++ = htonl(resp->taglen);
|
|
memcpy(p, resp->tag, resp->taglen);
|
|
p += XDR_QUADLEN(resp->taglen);
|
|
*p++ = htonl(resp->opcnt);
|
|
|
|
nfsd4_sequence_done(resp);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|